『Why Nations Fail』要約

In Why Nations Fail, economists Daron Acemoglu and James A. Robinson argue that a nation's prosperity depends not on geography, culture, or the ignorance of its leaders, but on its political and economic institutions. Their central distinction is between extractive institutions, which concentrate power and wealth in the hands of a narrow elite, and inclusive institutions, which protect property rights, enforce contracts, and allow broad participation in the economy and political process. The authors build this argument through a series of paired historical comparisons designed to isolate institutions as the deciding variable. The city of Nogales, split between Arizona and Sonora, shares geography, climate, and culture, yet the northern half is far wealthier because of the different institutional paths of the United States and Mexico. South and North Korea offer a similar natural experiment. They also trace critical junctures such as the Black Death, the Glorious Revolution, and the colonization of the Americas to show how small institutional differences can compound over centuries into vast divergences in development. A key mechanism the book identifies is creative destruction: sustained growth requires allowing new technologies and firms to displace established ones, which threatened elites often resist. Acemoglu and Robinson use this to explain why some states, such as the Soviet Union, grew for a time by reallocating resources but could not sustain innovation. They also emphasize virtuous and vicious circles, whereby inclusive institutions tend to persist and spread while extractive ones reinforce themselves. Published in 2012, the book won the 2024 Nobel Memorial Prize recognition for its authors' broader work on institutions and growth, and it remains a foundational text in comparative political economy.