Taken together, they are the culmination of more than fifty years of reflection on liberalism and on some of the most pressing problems of our times by John Rawls. This book consists of two parts: “The Law of Peoples,” a major reworking of a much shorter article by the same name published in 1993, and the essay “The Idea of Public Reason Revisited,” first published in 1997. “The Law of Peoples” extends the idea of a social contract to the Society of Peoples and lays out the general principles that can and should be accepted by both liberal and non-liberal societies as the standard for regulating their behavior toward one another. In particular, it draws a crucial distinction between basic human rights and the rights of each citizen of a liberal constitutional democracy.