This authoritative work of historical scholarship has been revised throughout, including new material on: the introduction of ancient skepticism into Renaissance Europe; the role of Savonarola and his disciples in bringing Sextus Empiricus to the attention of European thinkers; and new material on Henry More, Blaise Pascal, Thomas Hobbes, Baruch Spinoza, Nicolas Malebranche, G.W. Leibniz, Simon Foucher and Pierre-Daniel Huet, and Pierre Bayle. The bibliography has also been updated.