Gavin Kitching is a Professor of Politics at the University of New South Wales, Sydney, Australia. In addition to Karl Marx and the Philosophy of Praxis (Routledge, 1988) and Marxism and Science: Analysis of an Obsession (Penn State, 1994), he has written books on Africa, Third World development and globalisation. A collection of personal essays, Wittgenstein and Society, will be published in 2003., Nigel Pleasants is Lecturer in Sociology and Philosophy at the University of Exeter, UK. He is the author of Wittgenstein and the Idea of a Critical Social Theory: A Critique of Giddens, Habermas and Bhaskar (Routledge, 1999).