TY  - BOOK
AU  - WRIGHT Robert
TI  - Nonzero: history, evolution and human cooperation 
SN  - 9780349113340 (pbk) :
PY  - 2000///
CY  - London
PB  - Abacus
KW  - HUMAN EVOLUTION
KW  -  HISTORY
KW  - SOCIAL EVOLUTION
N1  - Includes bibliograpical references and index
ER  -