The notion of "natural law" has repeatedly furnished human beings with a shared grammar in times of moral and cultural crisis. Stoic natural law, for example, emerged precisely when the Ancient World lost the Greek polis, which had been the point of reference for Plato's and Aristotle's political philosophy. In key moments such as this, natural law has enabled moral and legal dialogue between peoples and traditions holding apparently clashing world-views. This volume revisits some of these key moments in intellectual and social history, partly with an eye to extracting valuable lessons for...