Acknowledgements	ix
Introduction	Man, the Most Inquisitive Animal	1
One	The Origins of Survival	21
Two	The Growing Brain	57
Three	Sex and the Savannah	89
Four	A Family Affair	133
Five	Risky Business	173
Six	Violence	209
Seven	Co-operation and Altruism	247
Eight	Morality and Spirituality - Beyond Instinct?	283
	Bibliography	321
	Index	323