This book examines the first great law and economics movement in the early part of hte twentieth century through the work of one of its most original thinkers, Robert Hale. Today, Hale is best known among contemporary legal academics and philosophers for his groundbreaking writings on coercion and consent in market relations. The bulk of his writing, however, consisted of a critique ofnatural property rights. Taken together, these writings on coercion and property rights offer one fo the most profound and elaborated critiques of libertarianism.