David Marquand, who died in April 2024, was a prominent figure in late 20th century British politics. This collection is devoted to analysing, criticising and celebrating his political and academic contributions. Different articles concentrate on his historiography, the tension between liberalism and socialism, political economy, communitarianism, the dilemmas of choosing between loyalty to organizations and to values, as well as reminiscences of Marquand’s own contributions to practical politics.