The Research Unit for Political Economy's (RUPE's) brief historical account here of the origins of the Marxist theory of imperialism constitutes a crucial corrective to common errors regarding that history. In my article, "The Imperialist World System: Paul Baran's Political Economy of Growth After Fifty Years" (Monthly Review, May 2007), I began by pointing out that Baran's book was an outgrowth of classical Marxist thought—the ideas of Marx, Lenin, and Luxemburg. At the same time it represented a sharp departure from the rigid orthodoxy of linear development that had come to characterize so much of socialist (as well as bourgeois) thought—often presented in terms of Horace's phrase, quoted by Marx, "the tale is told of you." Baran's treatment of the imperialist world system was a startling contribution at the time that his book appeared, challenging the conventional assumptions of both the right and an increasingly calcified left
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