PROLOGUE I The Springs of Reason II Anaximander on Nature III Science and Speculation IV The Natural Philosophy of Heraclitus V The Divine Philosophy of Xenophanes VI Pythagoras and the Soul VII The Moral Law VIII The Principles of Human Knowledge THE SERPENT IX Parmenides and the Objects of Inquiry X Being and Becoming XI Stability and Change XII Zeno: Paradox and Plurality XIII Zeno: Paradox and Progression XIV The Ports of Knowledge Closed PARADISE REGAINED XV The Ionian Revival XVI Anaxagoras and the Nature of Stuffs XVII The Corpuscularian Hypothesis XVIII Philolaus and the Formal Cause XIX The Logic of Locomotion XX The Neo-Ionian World Picture XXI The Sophists XXII De Anima XXIII Conduct Unbecoming XXIV The Bounds of Knowledge EPILOGUE XXV The Last of the Line