Hobbes' philosophy is one of the high points of a century of great philosophical achievement and Leviathan is recognized as one of the great classics of political theory. But the response from Hobbes's contemporaries to his secular analysis of society demonstrated the challenging nature of his ideas. This collection of many of the major contemporary responses to his thought by leading figures, mostly never republished, provides an outstanding source for assessing his immediate impact and the long-term importance of his work.