Political Realism

Political realism views international politics chiefly as a struggle among states to secure their interests under conditions of uncertainty. Because the international system is anarchic, meaning that no overarching authority can guarantee every state's security, states depend heavily on their own capabilities and alliances. Classical and structural realists differ mainly over why this competition arises.

Why power becomes central

For realists, the primary objective of a state is survival and the preservation of political independence. Since other states' future intentions cannot be known with certainty, even defensive policies may appear threatening, producing a security dilemma.

• States operate through self-help, maintaining sufficient capabilities to deter coercion and defend their interests.
• States assess not only absolute benefits from cooperation but also how gains may alter their power relative to others.
• The pursuit of security can produce competition, arms accumulation and changing alliances even when no state initially seeks war.
• States use power for deterrence, defence, coercion, bargaining and the protection of strategic autonomy.

Elements of national power in classical realism

Power is the ability to influence outcomes or resist another state's influence. Hans J. Morgenthau treated national power as a combination of material resources and intangible qualities, whose importance depends on how effectively they are mobilised and used.

• Geography, natural resources and industrial capacity shape a state's resource base and its ability to sustain economic and strategic activity.
• Military preparedness and population affect the forces and human resources that a state can deploy, although numbers alone do not establish effective power.
• National character concerns relatively enduring collective qualities that may influence the manner in which national capabilities are used.
• National morale concerns the degree of public support and determination available to sustain foreign policy.
• The quality of diplomacy and government determines how coherently resources are assessed, coordinated and converted into influence.
• National power is therefore relational and dynamic: possession of resources does not automatically produce equivalent influence over every issue or opponent.

Classical and structural explanations

Classical realism, associated with Hans J. Morgenthau, explains power politics through human drives, prudence and national interest defined in terms of power. Structural realism, associated with Kenneth Waltz, locates the main cause in international anarchy and the distribution of capabilities rather than primarily in human nature.

• Both approaches treat power as indispensable to security, although power can be a means to survival rather than an unlimited end in itself.
• A balance of power may emerge when states build capabilities or form alliances to prevent one power from dominating the system.
• International law and institutions can facilitate cooperation, but realists stress that their effectiveness depends substantially on state interests and the prevailing distribution of power.
• Realism evaluates foreign policy mainly through national interest, relative capabilities and likely consequences rather than moral intention alone.