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 ParkerThe Marxist Theory of the StateThe Marxist Theory of Imperialism and its CriticsAn Introduction to Marxist Economic TheoryThe Nature of Social-Democratic ReformismOn Bureaucracy: A Marxist AnalysisThe Leninist Theory of Organisation.