This volume comprises several of Kirzner’s previously published papers on the subjects of methodological subjectivism and the history of entrepreneurship theory—topics of primary importance in Kirzner’s economic thought because one cannot fully understand entrepreneurship theory without considering subjectivism.The volume includes Kirzner's seminal paper “Methodological Individualism, Market Equilibrium, and Market Process,” in which “Kirzner conceptualized the role of the entrepreneurial function in the market process for the first time in his work.” According to the editors, that paper “opened the door to Kirzner’s research on the market process, leading six years later to the publication of Competition and Entrepreneurship. In doing so, it paved the way to the modern Austrian theory of the market process.”Israel M. Kirzner is a leading economist in the Austrian School and Emeritus Professor of Economics at New York University.Peter J. Boettke is University Professor of Economics and Philosophy at George Mason University and the BB&T Professor for the Study of Capitalism at the Mercatus Center.Frédéric Sautet is an economist and a specialist in Austrian market process theory. He has taught at The Catholic University of America, George Mason University, New York University, and the University of Paris Dauphine.