This book contains a selection of essays on key subjects Mandel worked on: the theory of the state, imperialism, reformism, and bureaucracy. "The Leninist Theory of Organisation" is an influential essay on class consciousness and organisation. The "Introduction to Marxist Economic Theory" was widely used as a textbook in classes on Marxist economics. This book is the first in a series of selected writings by Ernest Mandel. CONTENTS: Introduction by Ian Parker The Marxist Theory of the State The Marxist Theory of Imperialism and its Critics An Introduction to Marxist Economic Theory The Nature of Social-Democratic Reformism On Bureaucracy: A Marxist Analysis The Leninist Theory of Organisation.