In 1939, Hayek conceived of a grand project to "incorporate intellectual history, methodology, and an analysis of social problems, all aimed at shedding light on the consequences of socialism." He published the foundational works for this project separately, and this volume collects them all. Editor Bruce Caldwell has provided translations where they were absent and has revised and corrected the text. The introduction, as Caldwell writes, tells "the story of Hayek's greatest unfinished piece of work."