Why Poor Countries Are Becoming Richer, Democratic, Increasingly Peaceable, and Sometimes More Dangerous

It is easy to be confused about the world’s prospect. On the one hand, since the collapse of the Soviet Union and its empire, many millions of people have been freed from economic and political shackles that had long kept them under authoritarian rule and in poverty—or at least far poorer than they should be. On the other hand, several parts of the world are beset by political turmoil and conflicts, rapid population increases, and falling incomes.