This book offers an original way of bridging the gap between what biologists and social scientists have to say about human behaviour.

Preface; 1. The biological perspective; 2. The relationships perspective; 3. The study of immediate causation - some implications of a relationships approach; 4. Development - organism and environment; 5. Development - the individual and relationships; 6. Universal individual characteristics; 7. Interindividual relationships; 8. The dialectics with higher levels; 9. How far is the concept of adaptedness useful at the higher levels?; Epilogue; Bibliography; Indices.