Gareth Evans has strong claims to being the most influential Australian political figure of the past half century on the international stage. As foreign minister, he helped bring about the Cambodia peace settlement and negotiate the Chemical Weapons Convention. His energetic post-political life has encompassed the leadership of an outstanding non-government organisation, the International Crisis Group, and participation in the work of several important international commissions. His book is an account of the emergence of a new international norm – the responsibility to protect – by the person who has done more to develop it than any other: the ‘norm entrepreneur’ himself, in the language of some international relations theorists.