• Source: Realism (international relations)

Realism, a school of thought in international relations theory, is a theoretical framework that views world politics as an enduring competition among self-interested states vying for power and positioning within an anarchic global system devoid of a centralized authority. It centers on states as rational primary actors navigating a system shaped by power politics, national interest, and a pursuit of security and self-preservation.
Realism involves the strategic use of military force and alliances to boost global influence while maintaining a balance of power. War is seen as an inevitability inherent in the anarchic conditions of world politics. Realism also emphasizes the complex dynamics of the security dilemma, where actions taken for security reasons can unintentionally lead to tensions between states.
Unlike idealism or liberalism, realism underscores the competitive and conflictual nature of global politics. In contrast to liberalism, which champions cooperation, realism asserts that the dynamics of the international arena revolve around states actively advancing national interests and prioritizing security. While idealism leans towards cooperation and ethical considerations, realism argues that states operate in a realm devoid of inherent justice, where ethical norms may not apply.
Early popular proponents of realism included Thucydides (5th century BCE), Machiavelli (16th century), Hobbes (17th century), and Rousseau (18th century). Carl von Clausewitz (early 19th century), another contributor to the realist school of thought, viewed war as an act of statecraft and gave strong emphasis on hard power. Clausewitz felt that armed conflict was inherently one-sided, where typically only one victor can emerge between two parties, with no peace.
Realism became popular again in the 1930s, during the Great Depression. At that time, it polemicized with the progressive, reformist optimism associated with liberal internationalists like U.S. President Woodrow Wilson. The 20th century brand of classical realism, exemplified by theorists such as Reinhold Niebuhr and Hans Morgenthau, has evolved into neorealism—a more scientifically oriented approach to the study of international relations developed during the latter half of the Cold War. In the 21st century, realism has experienced a resurgence, fueled by escalating tensions among world powers. Some of the most influential proponents of political realism today are John Mearsheimer and Stephen Walt.




Overview


Realists fall into three classes based on their view of the essential causes of conflict between states:

Classical realists believe that conflict follows from human nature.
Neorealists attribute conflict to the dynamics of the anarchic state-system.
Neoclassical realists believe that conflict results from both, in combination with domestic politics. Neoclassical realists are also divided between defensive and offensive realism.
Realism entails a spectrum of ideas, which tend to revolve around several central propositions, such as:

State-centrism: states are the central actors in international politics,: 209  rather than leaders or international organizations;
Anarchy: the international political system is anarchic, as there is no supranational authority to enforce rules;
Rationality and/or egoism: states act in their rational self-interest within the international system; and
Power: states desire power to ensure self-preservation.
Political scientists sometimes associate realism with Realpolitik,
as both deal with the pursuit, possession, and application of power. Realpolitik, however, is an older prescriptive guideline limited to policy-making, while realism is a wider theoretical and methodological paradigm which aims to describe, explain, and predict events in international relations. As an academic pursuit, realism is not necessarily tied to ideology; it does not favor any particular moral philosophy, nor does it consider ideology to be a major factor in the behavior of nations.
However, realists are generally critical of liberal foreign policy. Garrett Ward Sheldon has characterised the priorities of realists as Machiavellian and seen them as prioritising the seeking of power, although realists have also advocated the idea that powerful states concede spheres of influence to other powerful states.




Common assumptions



The four propositions of realism are as follows.

State-centrism: States are the most important actors.
Anarchy: The international system is anarchic.
No actor exists above states, capable of regulating their interactions; states must arrive at relations with other states on their own, rather than it being dictated to them by some higher controlling entity.
The international system exists in a state of constant antagonism (anarchy).
Egoism: All states within the system pursue narrow self-interests.
States tend to pursue self-interest.
Groups strive to attain as many resources as possible (relative gain).
Power politics: The primary concern of all states is power and security.
States build up their militaries to survive, which may lead to a security dilemma.
Realists believe that mankind is not inherently benevolent but rather self-centered and competitive. This perspective, which is shared by theorists such as Thomas Hobbes, views human nature as egocentric (not necessarily selfish) and conflictual unless there exist conditions under which humans may coexist. It is also disposed of the notion that an individual's intuitive nature is made up of anarchy. In regards to self-interest, these individuals are self-reliant and are motivated in seeking more power. They are also believed to be fearful. This view contrasts with the approach of liberalism to international relations.
The state emphasises an interest in accumulating power to ensure security in an anarchic world. Power is a concept primarily thought of in terms of material resources necessary to induce harm or coerce other states (to fight and win wars). The use of power places an emphasis on coercive tactics being acceptable to either accomplish something in the national interest or avoid something inimical to the national interest. The state is the most important actor under realism. It is unitary and autonomous because it speaks and acts with one voice. The power of the state is understood in terms of its military capabilities. A key concept under realism is the international distribution of power referred to as system polarity. Polarity refers to the number of blocs of states that exert power in an international system. A multipolar system is composed of three or more blocs, a bipolar system is composed of two blocs, and a unipolar system is dominated by a single power or hegemon. Under unipolarity realism predicts that states will band together to oppose the hegemon and restore a balance of power. Although all states seek hegemony under realism as the only way to ensure their own security, other states in the system are incentivised to prevent the emergence of a hegemon through balancing.
States employ the rational model of decision making by obtaining and acting upon complete and accurate information. The state is sovereign and guided by a national interest defined in terms of power. Since the only constraint of the international system is anarchy, there is no international authority and states are left to their own devices to ensure their own security. Realists believe that sovereign states are the principal actors in the international system. International institutions, non-governmental organizations, multinational corporations, individuals and other sub-state or trans-state actors are viewed as having little independent influence. States are inherently aggressive (offensive realism) and obsessed with security (defensive realism). Territorial expansion is only constrained by opposing powers. This aggressive build-up, however, leads to a security dilemma whereby increasing one's security may bring along even greater instability as an opposing power builds up its own arms in response (an arms race). Thus, security becomes a zero-sum game where only relative gains can be made. Moreover, the "relative gains" notion of the realist school implies that states must fight against each other to gain benefits.
Realists believe that there are no universal principles with which all states may guide their actions. Instead, a state must always be aware of the actions of the states around it and must use a pragmatic approach to resolve problems as they arise. A lack of certainty regarding intentions prompts mistrust and competition between states.
Rather than assume that states are the central actors, some realists, such as William Wohlforth and Randall Schweller refer instead to "groups" as the key actors of interest.
Finally, states are sometimes described as "billiard balls" or "black boxes". This analogy is meant to underscore the secondary importance of internal state dynamics and decisionmaking in realist models, in stark contrast to bureaucratic or individual-level theories of international relations.




Realism in statecraft


The ideas behind George F. Kennan's work as a diplomat and diplomatic historian remain relevant to the debate over American foreign policy, which since the 19th century has been characterized by a shift from the Founding Fathers' realist school to the idealistic or Wilsonian school of international relations. In the realist tradition, security is based on the principle of a balance of power and the reliance on morality as the sole determining factor in statecraft is considered impractical. According to the Wilsonian approach, on the other hand, the spread of democracy abroad as a foreign policy is key and morals are universally valid. During the Presidency of Bill Clinton, American diplomacy reflected the Wilsonian school to such a degree that those in favor of the realist approach likened Clinton's policies to social work. Some argue that in Kennan's view of American diplomacy, based on the realist approach, such apparent moralism without regard to the realities of power and the national interest is self-defeating and may lead to the erosion of power, to America's detriment. Others argue that Kennan, a proponent of the Marshall Plan (which gave out bountiful American aid to post-WW2 countries), might agree that Clinton's aid functioned strategically to secure international leverage: a diplomatic maneuver well within the bounds of political realism as described by Hedley Bull.
Realists often hold that statesmen tend towards realism whereas realism is deeply unpopular among the public. When statesmen take actions that divert from realist policies, academic realists often argue that this is due to distortions that stem from domestic politics. However, some research suggests that realist policies are actually popular among the public whereas elites are more beholden to liberal ideas. Abrahamsen suggested that realpolitik for middle powers can include supporting idealism and liberal internationalism.




Historical branches and antecedents



While realism as a formal discipline in international relations did not arrive until World War II, its primary assumptions have been expressed in earlier writings. Realists trace the history of their ideas back to classical antiquity, beginning with Thucydides (fl. 5th century BCE).
Historian Jean Bethke Elshtain traces the historiography of realism:

The genealogy of realism as international relations, although acknowledging antecedents, gets down to serious business with Machiavelli, moving on to theorists of sovereignty and apologists for the national interest. It is present in its early modern forms with Hobbes's Leviathan (1651).
Modern realism began as a serious field of research in the United States during and after World War II. This evolution was partly fueled by European war migrants like Hans Morgenthau, whose work Politics Among Nations is considered a seminal development in the rise of modern realism. Other influential figures were George F. Kennan (known for his work on containment), Nicholas Spykman (known for his work on geostrategy and containment), Herman Kahn (known for his work on nuclear strategy) and E. H. Carr.




= Classical realism

=

Classical realism states that it is fundamentally the nature of humans that pushes states and individuals to act in a way that places interests over ideologies. Classical realism is an ideology defined as the view that the "drive for power and the will to dominate [that are] held to be fundamental aspects of human nature".
Prominent classical realists:

E. H. Carr
Hans Morgenthau
Reinhold Niebuhr – Christian realism
Raymond Aron
George Kennan




= Liberal realism or the English school of rationalism

=

The English school holds that the international system, while anarchical in structure, forms a "society of states" where common norms and interests allow for more order and stability than that which may be expected in a strict realist view. Prominent English School writer Hedley Bull's 1977 classic, The Anarchical Society, is a key statement of this position.
Prominent liberal realists:

Hedley Bull – argued for both the existence of an international society of states and its perseverance even in times of great systemic upheaval, meaning regional or so-called "world wars"
Martin Wight
Barry Buzan




= Neorealism or structural realism

=

Neorealism derives from classical realism except that instead of human nature, its focus is predominantly on the anarchic structure of the international system. States are primary actors because there is no political monopoly on force existing above any sovereign. While states remain the principal actors, greater attention is given to the forces above and below the states through levels of analysis or structure and agency debate. The international system is seen as a structure acting on the state with individuals below the level of the state acting as agency on the state as a whole.
While neorealism shares a focus on the international system with the English school, neorealism differs in the emphasis it places on the permanence of conflict. To ensure state security, states must be on constant preparation for conflict through economic and military build-up.
Prominent neorealists:

Robert J. Art – neorealism
Robert Gilpin – hegemonic theory
Robert Jervis – defensive realism
John Mearsheimer – offensive realism
Barry Posen – neorealism
Kenneth Waltz – defensive realism
Stephen Walt – defensive realism




= Neoclassical realism

=

Neoclassical realism can be seen as the third generation of realism, coming after the classical authors of the first wave (Thucydides, Niccolò Machiavelli, Thomas Hobbes) and the neorealists (especially Kenneth Waltz). Its designation of "neoclassical", then, has a double meaning:

It offers the classics a renaissance;
It is a synthesis of the neorealist and the classical realist approaches.
Gideon Rose is responsible for coining the term in a book review he wrote in 1998.
The primary motivation underlying the development of neoclassical realism was the fact that neorealism was only useful to explain political outcomes (classified as being theories of international politics), but had nothing to offer about particular states' behavior (or theories of foreign policy). The basic approach, then, was for these authors to "refine, not refute, Kenneth Waltz", by adding domestic intervening variables between systemic incentives and a state's foreign policy decision. Thus, the basic theoretical architecture of neoclassical realism is:

Distribution of power in the international system (independent variable)
Domestic perception of the system and domestic incentives (intervening variable)
Foreign policy decision (dependent variable)
While neoclassical realism has only been used for theories of foreign policy so far, Randall Schweller notes that it could be useful to explain certain types of political outcomes as well.
Neoclassical realism is particularly appealing from a research standpoint because it still retains a lot of the theoretical rigor that Waltz has brought to realism, but at the same time can easily incorporate a content-rich analysis, since its main method for testing theories is the process-tracing of case studies.
Prominent neoclassical realists:

Aaron Friedberg
Randall Schweller
William Wohlforth
Fareed Zakaria




= Realist constructivism

=
Some see a complementarity between realism and constructivism. Samuel Barkin, for instance, holds that "realist constructivism" can fruitfully "study the relationship between normative structures, the carriers of political morality, and uses of power" in ways that existing approaches do not. Similarly, Jennifer Sterling-Folker has argued that theoretical synthesis helps explanations of international monetary policy by combining realism's emphasis of an anarchic system with constructivism's insights regarding important factors from the domestic level. Scholars such as Oded Löwenheim and Ned Lebow have also been associated with realist constructivism.




Criticisms






= Democratic peace

=
Democratic peace theory advocates also that realism is not applicable to democratic states' relations with each other as their studies claim that such states do not go to war with one another. However, realists and proponents of other schools have critiqued this claim, claiming that its definitions of "war" and "democracy" must be tweaked in order to achieve this result. The interactive model of democratic peace observes a gradual influence of both democracy and democratic difference on wars and militarized interstate disputes. A realist government may not consider it in its interest to start a war for little gain, so realism does not necessarily mean constant battles.




= Hegemonic peace and conflict

=
Robert Gilpin developed the theory of hegemonic stability theory within the realist framework, but limited it to the economic field. Niall Ferguson remarked that the theory has offered insights into the way that economic power works, but neglected the military and cultural aspects of power.
John Ikenberry and Daniel Deudney state that the Iraq War, conventionally blamed on liberal internationalism by realists, actually originates more closely from hegemonic realism. The "instigators of the war", they suggest, were hegemonic realists. Where liberal internationalists reluctantly supported the war, they followed arguments linked to interdependence realism relating to arms control. John Mearsheimer states that "One might think..." events including the Bush Doctrine are "evidence of untethered realism that unipolarity made possible," but disagrees and contends that various interventions are caused by a belief that a liberal international order can transcend power politics.




= Inconsistent with non-European politics

=
Scholars have argued that realist theories, in particular realist conceptions of anarchy and balances of power, have not characterized the international systems of East Asia and Africa (before, during and after colonization).




= State-centrism

=
Scholars have criticized realist theories of international relations for assuming that states are fixed and unitary units.




= Appeasement

=
In the mid-20th century, realism was seen as discredited in the United Kingdom due to its association with appeasement in the 1930s. It re-emerged slowly during the Cold War.
Scholar Aaron McKeil pointed to major illiberal tendencies within realism that, aiming for a sense of "restraint" against liberal interventionism, would lead to more proxy wars, and fail to offer institutions and norms for mitigating great power conflict.




= Realism as degenerative research programs

=
John Vasquez applied Imre Lakatos's criteria, and concluded that realist-based research program is seen as degenerating due to the protean character of its theoretical development, an unwillingness to specify what makes the true theory, a continuous adoption of auxiliary propositions to explain away flaws, and lack of strong research findings. Against Vasquez, Stephen Walt argued that Vasquez overlooked the progressive power of realist theory. Kenneth Waltz claimed that Vasquez misunderstood Lakatos.




= Abstract theorizing and non-consensus moral principles

=
The mainstream version of realism is criticized for abstract theorizing at the expense of historical detail and for a non-consensus foundation of the moral principles of the "rules of international conduct"; as evidenced in the case of Russian invasion of Ukraine.




See also


Complex interdependence
Consensus reality
Consequentialism
International legal theory
Game theory
Global justice
Legalism (Chinese philosophy)
Might makes right
Negarchy
Peace through strength
Realpolitik
Moral nihilism
Deterrence theory




References






Further reading






External links


Political Realism in International Relations in Stanford Encyclopedia of Philosophy
"Political Realism". Internet Encyclopedia of Philosophy.
Richard K. Betts, "Realism", YouTube

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