Review of the hardback: 'This is an important book for philosophers as well as social scientists. It clearly models how pro-social behavior can emerge in social networks, and shows which network structures are most conducive to the development of co-operation, trust or fairness. The book advances our understanding of evolutionary games, since it makes them more realistic and applicable to the complex social structures we live in.' Cristina Bicchieri, University of Pennsylvania Review of the hardback: '... this work is certain to be invaluable to anyone following the road laid by Brian Skyrms. Additionally, I recommend this book to many of those unconvinced about the possibility of making the leap from an explanation of thin morality to a thick account. ... this work makes an important contribution to political philosophy and to the social sciences more broadly.' Church History