Contents 



Foreword 13 



I. Science versus Metaphysics 15 



II. History and Natural History 20 



III. Beginnings of Co-operation 50 



IV. Aggregations of Higher Animals 90 

 V. Group Behavior 133 



VI. Group Organization 175 



VII. Some Human Implications 209 



VIII. Social Transitions 244 



Literature Cited 277 



Index 289 



52556 



