When we look at systematic historical evidence... we find that authoritarianism buys little in terms of economic growth. For every authoritarian country that has managed to grow rapidly, there are several that have floundered. For every Lee Kuan Yew of Singapore, there are many like Mobutu Sese Seko of the Congo.
Democracies ... provide much greater economic stability, measured by the ups and downs of the business cycle. They are better at adjusting to external economic shocks (such as terms-of-trade declines or sudden stops in capital inflows). They generate more investment in human capital – health and education. And they produce more equitable societies.
Authoritarian regimes, by contrast, ultimately produce economies that are as fragile as their political systems....
At first sight, China seems to be an exception. ... Even though it has democratized some of its local decision-making, the Chinese Communist Party maintains a tight grip on national politics and the human-rights picture is marred by frequent abuses.
But China also remains a comparatively poor country. Its future economic progress depends in no small part on whether it manages to open its political system to competition, in much the same way that it has opened up its economy. Without this transformation, the lack of institutionalized mechanisms for voicing and organizing dissent will eventually produce conflicts that will overwhelm the capacity of the regime to suppress. Political stability and economic growth will both suffer.