ABOUT THE CONTRIBUTORS: Ernest Mandel was involved in the revolutionary socialist movement from the end of the 1930s. He was a leading member of the Fourth International until his death in 1995. His many works include Marxist Economic Theory, Late Capitalism and Long Waves of Capitalist Development. David Mandel teaches political science at the Universite du Quebec, Montreal. Among his previous works are 'The Petrograd Workers and the Fall of the Old Regime and Perestroika and the Soviet People.' Paul Le Blanc is an American historian, activist and Professor of History at La Roche College in Pittsburgh. He is the author of several books including 'A Short History of the U.S. Working Class' and 'Unfinished Leninism: The Rise and Return of a Revolutionary Doctrine'.