Educated at University of London (BA, 1974) and University of Cambridge (PhD, 1977). Currently Professor of History of Philosophy and History of Science, University of Sydney. Previous Books include: Explanatory Structures (1978), Descartes: Philosophy, Mathematics and Physics (1980), Cartesian Logic (1989), Descartes, An Intellectual Biography (1995), Descartes: The World and Other Writings (Cambridge University Press, 1998), The Soft Underbelly of Reason (1998), Descartes' System of Natural Philosophy (2000) and Francis Bacon and the Transformation of Early Modern Philosophy (2001).