International relations theory |
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Hegemonic stability theory (HST) is a theory of international relations, rooted in research from the fields of political science, economics, and history. HST indicates that the international system is more likely to remain stable when a single state is the dominant world power, or hegemon.[1] Thus, the end of hegemony diminishes the stability of the international system. As evidence for the stability of hegemony, proponents of HST frequently point to the Pax Britannica and Pax Americana, as well as the instability prior to World War I (when British hegemony was in decline) and the instability of the interwar period (when the American hegemon reduced its presence from world politics).[2][3]
The key mechanisms in hegemonic stability theory revolve around public goods provision: to resolve collective action problems regarding public goods, a powerful actor who is willing and able to shoulder a disproportionate share of public goods provision is needed.[4] Hegemonic stability may entail self-reinforcing cooperation, as it is in the interest of the hegemon to provide public goods and it is in interest of other states to maintain an international order from which they derive public goods.[4][5][6][7]