Reprinted from THE )OUII.NAL OT POLITICAL ECONOMY Vol. 75, No.6, December 1967 Copyright 1967 by The University of Chicago Printed in U.S .A. / LAISSEZ FAIRE: PRO AND CON FRANK H. KNIGHT* University of Chicago M Y TITLE might have been "Lais sez Faire in Some Recent Dis cussion-Political but Espe cially Literary-academic," as will soon appear. My interest in economics, as I need hardly say here, has been that of a teacher, especially of its general princi ples....