This book charts the development of political thought within the British Liberal Party and its successor, the Liberal Democrats. Beginning with Jo Grimond’s rise to the leadership in 1956, it follows the Liberal resurgence in the second half of the twentieth century through to the major setbacks of the 2015 general election and the 2016 referendum on UK membership of the European Union. Drawing on interviews with leading politicians and political thinkers, the book examines Liberal ideas against the background of key historical events and controversies, including the period of coalition government with the Conservatives.