question. Earlier volumes in the series have been welcomed for significantly advancing the discussion of the topics they have dealt with. The present volume will I believe be greeted equally enthusiastically by readers in many parts of the world. R. W. Home General Editor Australasian Studies in History and Philosophy of Science TABLE OF CONTENTS v FOREWORD PAUL GRIFFITHS / Introduction 1 SECTION ONE: BEYOND NATURAL SELECTION ELLIOTI SOBER / Models of Cultural Evolution 17 KIM STERELNY / Punctuated Equilibrium and Macroevolution 41 ROBIN CRAW / Margins of Cladistics: Identity, Difference and Place in the Emergence of Phylogenetic Systematics 1864-1975 65 SECTION TWO: CENTRAL CONCEPTS OF EVOLUTIONARY THEORY PAUL GRIFFITHS / Adaptive Explanation and the Concept of a Vestige 111 TIMOTHY SHANAHAN / Selection, Drift and the Aims of Evolutionary Theory 133 SECTION THREE: THE DEVELOPMENTAL SYSTEMS APPROACH