Peace and democracy are just two sides of the same coin,
    it has often been said. In a speech before the British parliament in June
    of 1982, President Ronald Reagan proclaimed that governments founded on a
    respect for individual liberty exercise "restraint" and "peaceful
    intentions" in their foreign policy. He then, perhaps unaware of the
    contrast, announced a "crusade for freedom" and a "campaign
    for democratic development."
2
In making these claims the President joined a long list
    of liberal theorists (and propagandists) and echoed an old argument: the
    aggressive instincts of authoritarian leaders and totalitarian ruling parties
    make for war. Liberal states, founded on such individual rights as equality
    before the law, free speech and other civil liberties, private property,
    and elected representation are fundamentally against war, this argument asserts.
    When citizens who bear the burdens of war elect their governments, wars become
    impossible. Furthermore, citizens appreciate that the benefits of trade can
    be enjoyed only under conditions of peace. Thus, the very existence of liberal
    states, such as the United States, the European Union and others, makes
    for peace. And so peace and democracy are two sides of the same coin.
    
      |  | 
Building on a growing literature in international political
      science, I question the pacific liberal claim by identifying three distinct
      theoretical traditions of liberalism: liberal pacifism, liberal imperialism,
      and a liberal internationalism that combines elements of both the previous
      two.
Despite the contradictions of liberal pacifism and liberal
    imperialism, I find with Immanuel Kant and other liberal republicans that
    liberalism does leave a coherent legacy on foreign affairs. Liberal states
    are different.
    They are indeed peaceful. But they are also prone to make war. Liberal states,
    as Kant argued they would, have created a separate peace. They also, as he
    feared they might, have discovered liberal reasons for aggression. I conclude
    by arguing that the differences among liberal pacifism, liberal imperialism,
    and Kant's liberal internationalism are not arbitrary. They are rooted in
    differing conceptions of the citizen and of societies and states. 
    Liberal Pacifism
There is no canonical description of liberalism. What
    we tend to call liberal resembles a family portrait of principles
    and institutions, recognizable by certain characteristics – for
    example, a commitment to individual freedom, government through
    democratic representation, rights of private
    property, and equality of opportunity – that most liberal
    states share, although none has perfected them all. Joseph Schumpeter
    clearly fits within this family when he considers the international
    effects of capitalism and democracy.
Schumpeter's "Sociology of Imperialisms," which
    was published in 1919, made a coherent and sustained argument concerning
    the pacifying
      (in the sense of non-aggressive) effects of liberal institutions and principle.
3
      Unlike some of the earlier liberal theorists, who focused on a single feature,
      such as trade
4 or failed to examine critically the arguments they were
      advancing, Schumpeter saw the interaction of capitalism and democracy as
      the foundation
      of liberal pacifism.
Capitalism, he suggests, produces an unwarlike disposition;
      its populace is "democratized, individualized, rationalized."
5
      The people's daily energies are daily absorbed in production. The disciplines
      of industry and the market train people in "economic rationalism;" the
      instability of industrial life necessitates calculation. Capitalism also "individualizes;" "subjective
      opportunities" replace the "immutable factors" of traditional,
      hierarchical society. Rational individuals demand democratic governance.
And democratic capitalism leads to peace. As evidence,
    Schumpeter claims that (1) throughout the capitalist world an
    opposition has arisen to "war,
        expansion, cabinet diplomacy;" (2) contemporary capitalism
        is associated with peace parties; and (3) the industrial worker
        of capitalism is "vigorously
        anti-imperialist." In addition, (4) the capitalist world
        has developed the means of preventing war, such as the Hague
        Court, and (5) the least feudal, most capitalist society – the
        United States – has
        demonstrated the least imperialistic tendencies. (With a curious
        absence of irony
        he notes that the United States left over half of Mexico unconquered
        in the war of
        1846-48.)
Schumpeter's explanation for liberal pacifism was simple. Only
    war profiteers and military aristocrats gain from wars. No democracy would
    pursue a minority
      interest and tolerate the high costs of imperialism. When free trade prevails, "no
      class" gains from forcible expansion: "foreign raw materials
      and food stuffs are as accessible to each nation as though they were in
      its own
      territory. Where the cultural backwardness of a region makes normal economic
      intercourse dependent on colonization it does not matter, assuming free
      trade, which of the 'civilized' nations undertakes the task of colonization."
6 
Liberal Imperialism
In contradistinction to the pacific view of popular government,
    Thucydides and later Niccolò Machiavelli argue that not only are free
    republics not pacifistic, they are the best form of state for imperial expansion.
    Establishing
    a republic fit for imperial expansion is, moreover, the best way to guarantee
    the survival of a state.
Machiavelli's republic is a classical, mixed republic.
    It is not a democracy, which he thought would quickly degenerate into a tyranny;
    nor is it founded on the modern liberal view of fundamental human rights.
    But it is characterized by popular liberty and political participation.
7
    The consuls serve as "kings;" the senate as an aristocracy managing
    the state, the people in the assembly as the source of strength.
Liberty results from the "disunion" – the
    competition and necessity for compromise required by the division
    of powers among senate, consuls and tribunes (the last representing
    the common people). Liberty also results from the popular veto.
    The powerful few, Machiavelli says, threaten tyranny because they
    seek to dominate; the mass demands not to be dominated. Their
    veto thus preserves the liberties of the state.
8 But
    since the people and the rulers have different social characters,
    the people need to be "managed" by the few to avoid
    having their recklessness overturn or their fecklessness undermine
    the ability of the state to expand.
9
    Thus the senate and the consuls plan expansion, consult oracles,
    and employ religion to manage the resources that the energy of
    the people supplies.
Strength, and then imperial expansion, result from the
    way liberty encourages increased population and property, which grow when
    the citizens know that
    their lives and goods are secure from arbitrary seizure. Free citizens equip
    large armies and provide soldiers who fight for public glory and the common
    good, because they are in fact their own.
10 Thus, if you seek the honor of
    having your state expand, Machiavelli advises, you should organize it as
    a free and popular republic like Rome, rather than as an aristocratic republic
    like Sparta or Venice. Expansion thus calls for a free republic.
"Necessity" – political survival – calls
    for expansion. If a stable aristocratic republic is forced by
    foreign conflict "to
    extend her territory, in such a case we shall see her foundations
    give way and herself quickly brought to ruin."
11 If
    domestic security, on the other hand, prevails, "the continued
    tranquillity would enervate her, or provoke internal dissensions,
    which together, or either of them separately,
    will
    apt to prove her ruin." Machiavelli therefore believes that
    it is necessary to take the constitution of Rome, rather than
    that of Sparta or Venice, as our model.
Hence liberal imperialism. We are lovers of glory, Machiavelli
    announces. We seek to rule, or at least to avoid being oppressed. In either
    case, we want more for ourselves and our states than just material welfare
    (materialistic monism). Because other states with similar aims thereby threaten
    us, we prepare ourselves for expansion. Because our fellow citizens threaten
    us if we do not allow them either to satisfy their ambition or to release
    their political energies through imperial expansion, we expand.
There is considerable historical evidence for liberal
    imperialism. Machiavelli's (Polybius') Rome and Thucydides' Athens both were
    imperial republics in the Machiavellian sense.
12 The
    historical record of numerous United States interventions in the postwar period supports
    Machiavelli's argument.
13 But the current record of liberal pacifism, weak as it is, calls
    some of Machiavelli's insights into question. To the extent that the modern
    populace actually controls (and thus unbalances) the mixed republic, their
    diffidence may outweigh elite ("senatorial") aggressiveness.
We can conclude either that (1) liberal pacifism has
    at last taken over with the further development of capitalist
    democracy, as Schumpeter predicted it would; or (2) the mixed
    record of liberalism – pacifism
    and imperialism – indicates that some liberal states are
    Schumpeterian democracies while others are Machiavellian republics.
    But before we accept either conclusion, we must consider a third
    apparent regularity of modern world politics.
 
    Liberal Internationalism
Modern liberalism carries with it two legacies. They affect liberal states,
    not separately, according to whether they are pacifistic or imperialistic,
    but simultaneously.
The first of these legacies is the pacification of foreign
    relations among liberal states.
14 During the
    nineteenth century, the United States and Great Britain engaged in nearly
    continual strife. But after the
    Reform Act of 1832 defined actual representation as the formal source of
    the sovereignty of the British parliament, Britain and the United States
    negotiated
    their disputes despite, for example, British grievances against the Northern
    blockade of the South, with which Britain had close economic ties. Despite
    severe Anglo-French colonial rivalry, liberal France and liberal Britain
    formed an entente against illiberal Germany before World War One. And in
    1914-15, Italy, the liberal member of the Triple Alliance with Germany and
    Austria, chose not to fulfil its treaty obligations under the Triple Alliance
    to support its allies. Instead, Italy joined in an alliance with Britain
    and France that had the result of preventing it from having to fight other
    liberal states and then declared war on Germany and Austria. And despite
    generations of Anglo-American tension and Britain's wartime restrictions
    on American trade with Germany, the United States leaned toward Britain and
    France from 1914 to 1917, before entering World War One on their side.
Beginning in the eighteenth century and slowly growing
    since then, a zone of peace, which Kant called the "pacific federation" or "pacific
    union," began to be established among liberal societies. (More than
    fifty liberal states currently make up the union. Most are in Europe and
    North America, but they can be found on every continent.)
Here, the predictions of liberal pacifists are borne
    out: liberal states 
do exercise peaceful restraint and a separate peace exists
    among them. This separate peace provides a political foundation for the United
    States' crucial alliances with the liberal powers (NATO, the alliances with
    Japan, Australia and New Zealand). This liberal alliance engendered the
    unbalanced, preponderance of resources that the "West" enjoyed
    during the Cold War. This foundation appears to be impervious to economic
    competition and personal quarrels with liberal allies. It also offers the
    promise of a continuing peace among liberal states. And, as the number of
    liberal states increases, it announces the possibility of global peace this
    side of the grave or world conquest.
Of course, the outbreak of war, in any given year, between
    any two given states, is a low probability event. But the occurrence
    of a war between any two adjacent states, considered over a long
    period of time, would be more probable. The apparent absence of
    war between liberal states, whether adjacent or not, for almost
    two hundred years may therefore have significance. Similar claims
    cannot be made for feudal, "fascist," communist,
    authoritarian or totalitarian forms of rule;
15 nor
    for pluralistic, or merely similar societies. More significant
    perhaps, is that when states are forced
    to decide on which side of an impending world war they will fight,
    liberal states wind up all on the same side, despite the complexity
    of the paths that take them there. These characteristics do not
    prove that the peace among liberals is statistically significant,
    nor that liberalism is the peace's sole valid explanation.
16 But
    they do suggest that we consider the possibility that liberals
    have indeed established a separate peace – but only among
    themselves.
Liberalism also carries with it a second
      legacy – international 
  "imprudence."
17 Peaceful
  restraint only seems to work in the liberals' relations with other
  liberals. Liberal states have fought numerous wars with non-liberal
  states.
18 
Many of these wars have been defensive, and thus prudent
    by necessity. Liberal states have been attacked and threatened
    by non-liberal states that do not exercise any special restraint
    in their dealings with liberal states. Authoritarian rulers both
    stimulate and respond to an international political environment
    in which conflicts of prestige, of interest, and of pure fear
    of what other states might do, all lead states toward war. War
    and conquest have thus characterized the careers of many authoritarian
    rulers and ruling parties – from Louis XIV and Napoleon
    Bonaparte to Benito Mussolini's fascists, Adolf Hitler's Nazis,
    and Joseph Stalin's communists.
But we cannot simply blame warfare on the authoritarians
    or totalitarians, as many of our more enthusiastic politicians would have
    us do. Most wars arise out of calculations and miscalculations of interest,
    misunderstandings, and mutual suspicions, such as those that characterized
    the origins of World War One. But aggression by the liberal state has also
    characterized a large number of wars. Both France and Britain fought expansionist
    colonial wars throughout the nineteenth century. The United States fought
    a similar war with Mexico in 1846-48, waged a war of annihilation against
    the American Indians, and intervened militarily against sovereign states
    many times before and after World War Two. Liberal states invade weak non-liberal
    states and display striking distrust in dealings with powerful non-liberal
    states.
19
  
Kant's theory of liberal internationalism helps us understand
    these two legacies. The importance of Immanuel Kant as a theorist of international
    ethics has been well appreciated.
20 But Kant
    also has an important analytical theory of international politics. 
Perpetual
    Peace, written in 1795, helps
    us understand the interactive nature of international relations. Methodologically,
    he tries to teach us that we cannot study either the systemic relations of
    states or the varieties of state behavior in isolation from each other. Substantively,
    he anticipates for us the ever-widening pacification of a liberal pacific
    union, explains that pacification, and at the same time suggests why liberal
    states are not pacific in their relations with non-liberal states. Kant argues
    that perpetual peace will be guaranteed by the ever-widening acceptance of
    three "definitive articles" of peace. When all nations have accepted
    the definitive articles in a metaphorical "treaty" of perpetual
    peace he asks them to sign, perpetual peace will have been established.
First, republican governments, he argues, tame the aggressive
    interests of absolutist monarchies and ingrain the habit of respect for individual
    rights. Wars then appear as direct charges on the people's welfare that he
    and the other liberals thought them to be. Yet these domestic republican
    restraints do not end war. If they did, liberal states would not be warlike,
    which is far from the case. They do introduce republican caution, Kant's "hesitation," in
    place of monarchical caprice. Liberal wars are only fought for popular, liberal
    purposes. The historical liberal legacy is laden with popular wars fought
    to promote freedom, protect private property or support liberal allies against
    non-liberal enemies.
21
  
Second, in order to see how the pacific union removes
      the occasion of wars among liberal states and not wars between
    liberal and non-liberal states, we need to shift our attention
    from constitutional law
      to international law, Kant's second source. Complementing the
    constitutional guarantee of caution, international law adds a
    second source – a
      guarantee of respect. The separation of nations is reinforced
    by the development of separate languages and religions. These
    further guarantee a world of separate states—an essential
    condition needed to avoid a "global, soul-less
      despotism." Yet, at the same time, they also morally integrate
      liberal states "as culture grows and men gradually move
      towards greater agreement over their principles, they lead to
      mutual understanding and peace."
22
      As republics emerge (the first source) and as culture progresses,
      the established practice of recognized legal rights resting
      on an understanding of the legitimate rights of all citizens
      and of all republics comes into play; and this, now
      that caution characterizes policy, sets up the institutional
      and moral foundations for the liberal peace. Correspondingly,
      international law highlights the
      importance of Kantian publicity.
Domestically, publicity helps ensure that
        the officials of republics act according to the principles they profess
        to hold just and according to the interests of the electors they claim
        to represent.
        Internationally, free speech and the effective communication of accurate
        conceptions of the political life of foreign peoples is essential to
    establish and preserve the understanding on which the guarantee of respect
    depends.
        Domestically, just republics, which rest on consent, then presume foreign
        republics to be also consensual, just, and therefore deserving of accommodation.
        The recognition of legitimate rights and the experience of cooperation
        helps engender further cooperative behavior when the consequences of
    state policy are unclear but (potentially) mutually beneficial. At the same
    time,
        liberal states assume that non-liberal states, which do not rest on free
        consent, are not just. Because non-liberal governments are perceived
    to be in a state of aggression with their own people, their foreign relations
        become for liberal governments deeply suspect. In short, fellow liberals
        benefit from a presumption of amity; non-liberals suffer from a presumption
        of enmity. Both presumptions may be accurate. Each, however, may also
    be
        self-fulfilling. 
Democratic liberals do not need to assume either that
      public opinion rules foreign policy or that the entire governmental elite
      is liberal. It can assume that the elite typically manages public affairs
      but that potentially non-liberal members of the elite have reason to doubt
      that antiliberal policies would be electorally sustained and endorsed by
      the majority of the democratic public.
Third and lastly, cosmopolitan law
      adds material incentives to moral commitments. The cosmopolitan right to
      hospitality permits the "spirit of commerce" sooner or later to
      take hold of every nation, thus creating incentives for states to promote
      peace and to try to avert war. Liberal economic theory holds that these cosmopolitan
      ties derive from a cooperative international division of labor and free trade
      according to comparative advantage. Each economy is said to be better off
      than it would have been under autarky; each thus acquires an incentive to
      avoid policies that would lead the other to break these economic ties. Since
      keeping open markets rests upon the assumption that the next set of transactions
      will also be determined by legal rights and agreed upon prices rather than
      coercion, a sense of mutual security is vital to avoid security-motivated
      searches for economic autarky. Thus avoiding a challenge to another liberal
      state's security or even enhancing each other's security by means of alliance
      naturally follows economic interdependence.
    
      |  | 
A further cosmopolitan source of liberal peace is that
      the international market removes difficult decisions of production and
    distribution from the direct sphere of state policy. A foreign state thus
    does not appear
      directly responsible for these outcomes; states can stand aside from, and
      to some degree above, these contentious market rivalries and be ready to
      step in to resolve crises. The interdependence of commerce and the international
      contacts of state officials help create crosscutting transnational ties
    that serve as lobbies for mutual accommodation.
23 According
    to modern liberal scholars, international financiers and transnational and
    transgovernmental
      organizations
      create interests in favor of accommodation. Moreover, their variety has
    ensured no single conflict sours an entire relationship by setting off a
    spiral of
      reciprocated retaliation. Trust, property rights and mutual expectation
    of the rule of law make economic and other disputes easier to settle. Conversely,
      a sense of suspicion, such as that characterizing relations between liberal
      and non-liberal governments, can exacerbate disputes and lead to restrictions
      on the range of contacts between societies and this can increase the prospect
      that a single conflict will determine an entire relationship.
No single constitutional, international or cosmopolitan
    source alone is sufficient. Kantian theory is neither solely institutional
    nor solely ideological, nor solely economic. But together, 
and only together    do the three specific strands of liberal institutions, liberal ideas, and
    the transnational ties that follow from them plausibly connect the characteristics
    of liberal polities and economies with sustained liberal peace. But in their
    relations with non-liberal states, liberal states have not escaped from the
    insecurity caused by anarchy in the world political system considered as
    a whole. Moreover, the very constitutional restraint, international respect
    for individual rights, and shared commercial interests that establish grounds
    for peace among liberal states establish grounds for additional conflict
    in relations between liberal and non-liberal societies.
    Comparisons
Much of the debate on the democratic peace or liberal
    pacifism isolates one feature of democracy or liberalism and then tests it
    against the historical record. It is thus worth stressing that Kant's theory
    rejects that approach.
24 He presents each of the three "definitive articles" as
    necessary conditions that and only together establish a sufficient condition
    of establishing a pacific union. 
Representation or democracy (the so-called domestic "structural" causes
    of the democratic peace) only ensures that foreign policy reflects the preferences
    of the median voter, whatever they may be. If those preferences are rational
    egositic, then however rational or powerful the state may be, it will only
    be pacific to the extent that a particular bilateral peace produces greater
    material benefits than would aggression (discounting but still counting all
    systemic and temporal effects). This is a weak reed for a wealthy, resource
    rich or strategically vital, but very weak democratic state to rely upon
    in its relations with powerful and also democratic states.
25
  
A related objection applies to purely "normative" explanations
    of the liberal peace. The norms, to the extent they are normative, apply
    to all statespersons as moral agents, as human beings, anywhere, whatever
    their state structure. Yet states other than liberal states do not maintain
    peace (and liberals maintain peace only with each other).
26 In short, Kant's
    argument for the combined effect of structures, norms, and interests warrants
    our attention.
In order to sort out the varied legacy of liberalism
    on international relations, we should also recall that Kant's liberal internationalism,
    Machiavelli's liberal imperialism, and Schumpeter's liberal pacifism rest
    on fundamentally different views on the nature of man, the state, and international
    relations.
27 Schumpeter's man is rationalized, individualized, and democratized.
    He is also homogenized, pursuing material interests "monistically." Since
    his material interests lie in peaceful trade, he and the democratic state
    that he and his fellow citizens control are pacifistic. Machiavelli's citizens
    are splendidly diverse in their goals, but they are fundamentally unequal
    in them as well, seeking to rule or fearing being dominated. Extending the
    rule of the dominant elite, or avoiding the political collapse of their state,
    each call for imperial expansion. 
Kant's citizens, too, are diverse in their goals, and
    they are individualized and rationalized. But most importantly,
    they are capable of appreciating the moral equality of all individuals
    and of treating other individuals as ends rather than as means.
    The Kantian state thus is governed publicly according to law,
    as a republic. Kant's is the state that – formally,
    legally—solves the problem of governing individualized
    equals whether they are the "rational devils" he says
    we often find ourselves to be or the ethical agents we can and
    should become. 
“In order to organize a group of rational beings
    who together require universal laws for their survival, but of whom each
    separate individual is secretly inclined to exempt himself from them, the
    constitution must be so designed so that, although the citizens are opposed
    to one another in their private attitudes, these opposing views may inhibit
    one another in such a way that the public conduct of the citizens will be
    the same as if they did not have such evil attitudes.”28
Unlike Machiavelli's republics, Kant's republics are
    capable of achieving peace among themselves because they exercise
    democratic caution and because they are capable of appreciating
    the international rights of foreign republics. These international
    rights of republics derive from the representation of foreign
    individuals, who are our moral equals. Unlike Schumpeter's capitalist
    democracies, Kant's republics remain in a state of war with non-republics.
Liberal republics see themselves as threatened by aggression from
    non-republics that are not constrained by representation. And
    even though wars often cost more than the economic return they
    generate, liberal republics also are prepared to protect and promote – sometimes
    forcibly – democracy, private property, and the rights of
    individuals overseas against
    non-republics which, because they do not authentically represent
    the rights of individuals, have no rights to non-interference.
    These wars may liberate oppressed individuals overseas; they can
    also generate enormous suffering.
Preserving the legacy of the liberal peace without succumbing
    to the legacy of liberal imprudence is both a moral and a strategic challenge.
    The near certainty of mutual devastation resulting from a nuclear war between
    the superpowers has created a "crystal ball effect" which has helped
    to constrain the tendency toward miscalculation that was present at the outbreak
    of so many wars in the past. But this "nuclear peace" appeared
    to have been limited to the superpowers. It did not curb military interventions
    in the Third World. Moreover, it is subject to a desperate technological
    race designed to overcome its constraints and to crises that have pushed
    even the superpowers to the brink of war. We must still reckon with the war
    fevers and moods of appeasement that have almost alternately swept liberal
    democracies.
    
      |  | 
      | Burning oil wells and a destroyed Iraqi tank, Al Maqwa,
        Kuwait, March 1991. Copyright  © UN/DPI/J. Isaac
 | 
Yet restraining liberal imprudence, whether
      aggressive or passive, may not be possible without threatening liberal
    pacification. Improving the strategic acumen of our foreign policy calls
    for introducing
        steadier strategic calculations of the long run national interest and
    more flexible responses to changes in the international political environment.
        Constraining the indiscriminate meddling of our foreign interventions
    calls
        for a deeper appreciation of the "particularism of history, culture,
        and membership."
29 However, both the improvement in strategy and the
        constraint on intervention, in turn, seem to require an executive freed from
        the restraints
        of a representative legislature in the management of foreign policy and a
        political culture indifferent to the universal rights of individuals. And
        these, in their turn, could break the chain of constitutional guarantees,
        the respect for representative government, and the web of transnational contact
        that have sustained the pacific union of liberal states.
Perpetual peace, Kant says, is the endpoint of the hard
    journey his republics will take. The promise of perpetual peace, the violent
    lessons of war, and the experience of a partial peace are proof of the need
    for and the possibility of world peace. They are also the grounds for moral
    citizens and statesmen to assume the duty of striving for peace. 
 
  
1. This essay draws on parts of Michael W. Doyle's Ways
      of War and Peace. 1997. New York: W.W. Norton.
Michael W. Doyle is the Harold Brown Professor at Columbia
    University in the School of International and Public Affairs and Columbia
    Law School.
Professor Doyle previously has taught at the University of Warwick (United
  Kingdom), Johns Hopkins University and Princeton University. His publications
  include Ways of War and Peace (W.W. Norton); Empires (Cornell University Press);
  UN Peacekeeping in Cambodia: UNTAC's Civil Mandate (Lynne Rienner Publishers);
  Keeping the Peace (Cambridge University Press) which he edited with Ian Johnstone
  and Robert Orr; Peacemaking and Peacekeeping for the New Century (Rowman and
  Littlefield) edited with Olara Otunnu; New Thinking in International Relations
  Theory (Westview) edited with John Ikenberry; Escalation and Intervention:
  Multilateral Security and Its Alternatives (Westview Press/United Nations Association)
  edited with Arthur Day; and Alternatives to Monetary Disorder (Council on Foreign
  Relations/McGraw Hill) which he wrote with Fred Hirsch and Edward Morse.
He recently served as Assistant Secretary-General and Special Adviser to United
  Nations Secretary-General 
Kofi Annan.
  His responsibilities in the Secretary-General's Executive Office included strategic
  planning, outreach to the international corporate sector (the "Global
  Compact") and relations with Washington. He is currently chairman of the
  Academic Council of the 
United Nations Community.
  He was the Director of the Center of International Studies of Princeton University
  and chairman of the Editorial Board and the Committee of Editors of 
World
  Politics. He was the vice-president and senior fellow of the International
  Peace Academy and is now a member of its board of directors. He has also served
  as a member of the External Research Advisory Committee of the 
UNHCR,
  the Advisory Committee of the Lessons-Learned Unit of the Department of Peace-Keeping
  Operations (UN), and is a member of the Council on Foreign Relations, New York.
  In 2001, he was elected a fellow of the American Academy of Arts and Sciences.
Michael Doyle is married, has a daughter and lives in
    Philadelphia and New York.
  
2. Reagan, Ronald. 1983/1984. "Peace and
    National Security," televised address to the nation, Washington D.C.,
    March 23, 1983, p. 40 in the U.S. State Department, Realism, Strength,
    Negotiation, May 1984.
  
3. Schumpeter, Joseph. 1950. Capitalism,
      Socialism, and Democracy. New York: Harper Torchbooks. Doyle, Michael
      W. 1986. "Liberalism and World Politics," American Political
      Science Review, vol. 80, no. 4 (December), pp. 1151-1169.
  
4. Montesquieu, Charles de Secondat, Baron of.
    1748/1966. Spirit of the Laws. New York: Hafner, bk. 20, ch. 1.
  
5. Schumpeter, Joseph. 1955. "The Sociology
    of Imperialism." Imperialism and Social Classes. Cleveland: World
    Publishing, p. 68.
  
6.  Ibid. pp. 75-76. A study by R.J. Rummel
    of "libertarianism" and international violence is the closest test
    that Schumpeterian pacifism has received (1983). "Free" states
    (those enjoying political and economic freedom) have considerably less conflict
    at the level of economic sanctions or above (more violent) than "non-free" states.
    The free, the partly free (including the democratic socialist countries such
    as Sweden), and the non-free accounted for .24, .26 and .61 of the violence,
    respectively. These correlations are impressive, but not conclusive for the
    Schumpeterian thesis. The data set is limited, in this test, to 1976-1980.
    It includes, for example, the Russian-Afghan War, the Vietnamese invasion
    of Cambodia, China's invasion of Vietnam and Tanzania's invasion of Uganda,
    but just misses the U.S. quasi-covert intervention in Angola (1975) and the
    not so covert war against Nicaragua (1981). More importantly, it excludes
    the cold war period with its numerous interventions and the long history
    of colonial wars (the Boer War, the Spanish American War, the Mexican Intervention,
    etc.) that marked the history of liberal, including democratic capitalist
    states. See Rummel, Rudolph J. 1983. "Libertarianism and International
    Violence." Journal of Conflict Resolution, vol. 27, pp. 27-71.
  
7. Machiavelli, Niccolò. 1950. The
      Prince and the Discourses, trans. Luigi Ricci and Christian Detmold,
      ed. Max Lerner. New York: Modern Library, bk. I, ch. 2, p. 112; Mansfield,
      Harvey C. 1970. "Machiavelli's New Regime." Italian Quarterly,
      vol. 13, pp. 63-95; Skinner, Quentin. 1981. Machiavelli. New York:
      Hill and Wang, ch. 3; Huliung, Mark, 1983. Citizen Michavelli. Princeton:
      Princeton University Press, ch. 2.
  
8. Ibid, bk. I, ch. 5, p. 122.
  
9. Ibid, bk. I, ch. 53, pp. 249-250.
  
10. Ibid, bk. II, ch. 2, pp. 287-290.
  
11. Ibid, bk. I, ch. 6, p. 129.
  
12. Thucydides, 1954/1972. The Peloponnesian
      War, trans. Rex Warner, intro. M.I. Finley. Harmondsworth, England:
      Penguin, bk. 6.
  
13. Aron, Raymond. 1973. The Imperial Republic,
    trans. Frank Jellinek. Englewood Cliffs, New Jersey: Prentice Hall, chs.
    3-4; Barnet, Richard. 1968. Intervention and Revolution: The United States
    in the Third World. New York: Meridian, ch. 11.
  
14.  Clarence Streit (1938. Union Now: A
      Proposal for a Federal Union of the Leading Democracies. New York:
      Harper, pp. 88, 90-92) seems to have been the first to point out (in contemporary
      foreign relations) the empirical tendency of democracies to maintain peace
      among themselves, and he made this the foundation of his proposal for a
      (non-Kantian) federal union of the leading democracies of the 1930s. In
      a very interesting book, Ferdinand Hermens (1944) explored some of the
      policy implications of Streit's analysis. D.V. Babst (1972. "A Force
      of Peace." Industrial Research, vol. 14 (April), pp. 55-58)
      performed a quantitative study of this phenomenon of "democratic peace." And
      R.J. Rummel did a similar study of "libertarianism" (in the sense
      of laissez faire) focusing on the post-war period (1983), which
      drew on an unpublished study (Project No. 48) noted in Appendix I:7.5 (1979,
      p. 386). I use "liberal" in a wider (Kantian) sense in my discussion
      of this issue in (1983). In that essay, I survey the period from 1790 to
      the present, and find no war among liberal states.
  
15. Doyle, Michael W. 1983. "Kant, Liberal
    Legacies and Foreign Affairs," Part 1 and 2, Philosophy and Public
    Affairs, vol. 12, nos. 3-4 (Summer and Fall), p. 222.
  
16. Babst (ibid, "A Force for Peace," 1972)
    did make a preliminary test of the significance of the distribution of alliance
    partners in World War One. He found that the possibility that the actual
    distribution of alliance partners could have occured by chance was less than
    1% (p. 56). But this assumes that there was an equal possibility that any
    two nations could have gone to war with each other; and this is a strong
    assumption. The most thorough statistical demonstration of the significance
    of the liberal peace, controlling for alliance patterns, proximity, economic
    interdependence, etc. can be found in Zeev Maoz and Bruce Russett, "Alliance,
    Contiguity, Wealth, Political Stability: Is the Lack of Conflict Among Democracies
    a Statistical Artifact," International Interactions, vol. 17,
    no. 3 (1992), pp. 245-267.
  
17. Hume, David. 1752/1963. "Of the Balance
    of Power," Essays: Moral, Political, and Literary. Oxford: Oxford
    University Press, pp. 346-347.
  
18. Small, Melvin and Singer, J. David. 1976. "The
    War-proneness of Democratic Regimes." Jerusalem Journal of International
    Relations, vol. 50, no. 4 (Summer), pp. 50-69.
  
19. Op. cit. 1983. "Kant, Liberal Legacies."
  
20. Armstrong, A.C. 1931. "Kant's Philosophy
    of Peace and War." Journal of Philosophy, vol. 28, pp. 197-204;
    Friedrich, Karl. 1948. Inevitable Peace. Cambridge, Mass.: Harvard
    University Press; Waltz, Kenneth. 1962. "Kant, Liberalism, and War." American
    Political Science Review, vol. 56, pp. 331-340; Hoffmann, Stanley. 1965. The
    State of War. New York: Praeger; Hinsley, F.H. 1967. Power and the
    Pursuit of Peace. Cambridge, England: Cambridge University Press, ch.
    4; Hassner, Pierre. 1972. "Immanuel Kant," in Leo Strauss and Joseph
    Cropsey, eds., History of Political Pihlosophy. Chicago: Rand McNally;
    Galston, William. 1975. Kant and the Problem of History. Chicago:
    University of Chicago Press; Gallie, W. 1978. Philosophers of Peace and
    War. New York: Cambridge University Press, ch. 1; Williams, Howard. 1983. Kant's
    Political Philosophy. Oxford: Basil Blackwell.
  
21. Kant regards these wars as unjust and warns
    liberals of their susceptibility to them (Perpetual Peace, in 1970,
    p. 106). At the same time, he argues that each nation "can and ought
    to" demand that its neighboring nations enter into the pacific union
    of liberal states (p. 102).
  
22. Op. cit., Kant. 1970, p. 114.
  
23. See
    for example, Russett, Bruce and O'Neal, John, Triangulating Peace: Democracy,
    Interdependence, and International Organizations, New York: W.W. Norton,
    2000.
  
24. A useful survey of that literature can be
    found in Harvey Starr, "Why Don't Democracies Fight One Another? Evaluating
    the Theory-Findings Feedback Loop," Jerusalem Journal of International
    Relations, vol. 14, no. 4 (1992), pp. 41-57.
  
25. Lake, David. 1992. "Powerful Pacifists:
    Democratic States and War," American Political Science Review,
    vol. 86, no. 1 (March 1992), pp. 24-37.
  
26. Maoz, Zeev and Russett, Bruce. "Alliance,
    Contiguity, Wealth and Political Stability: Is the Lack of Conflict among
    Democracies a Statistical Artifact?" International Interactions,
    vol. 17, no. 3. pp. 245-268.
  
27. For a comparative discussion of the political
    foundations of Kant's ideas see Shklar, Judith. 1984. Ordinary Vices.
    Cambridge, Mass.: Harvard University Press, pp. 232-238.
  
28. Kant, Immanuel. 1970. Kant's Political
      Writings, ed. Hans Reiss and trans. H.B. Nisbet. Cambridge: Cambridge
      University Press, England, p. 113.
  
29. Walzer, Michael. 1983. Spheres of Justice.
    New York: Basic Books, p. 5. 
First published 22 June 2004
TO CITE THIS PAGE:
MLA
 style: "Liberal Internatinalism: Peace, War and Democracy". 
Nobelprize.org. 23 May 2012 
http://www.nobelprize.org/nobel_prizes/peace/articles/doyle/ 
 
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