Behaviours change culture, not the other way around. The spread of behaviours is the real source of social change. Behavioural imitation explains how social change happens, how epidemics of ideas are formed, how social fashions appear and how company cultures shape and reshape themselves. In this book, Leandro Herrero addresses Viral Change™ in action, showing that the more primal ‘Homo Imitans’ is still a powerful force. Understanding how social, behavioural infection works is the basis for the orchestration of any ‘epidemic of success’, be it a successful change inside a firm or a counter-social epidemic to tackle negative socio-macro phenomena.