The Masyumi Party, which was active in Indonesia from 1945 to 1960, constitutes the boldest attempt to date at reconciling Islam and democracy. Masyumi proposed a vision of society and government which was not bound by a literalist application of Islamic doctrine but rather inspired by the values of Islam. It set out moderate policies which were both favourable to the West and tolerant towards other religious communities in Indonesia. Although the party made significant strides towards the elaboration of a Muslim democracy, its achievements were nonetheless precarious: it was eventually outlawed in 1960 for having resisted Sukarno’s slide towards authoritarianism, and the refusal of Suharto’s regime to reinstate the party left its leaders disenchanted and marginalised. Many of those leaders subsequently turned to a form of Islam known as integralism, a radical doctrine echoing certain characteristics of 19th-century Catholic integralism, which contributed to the advent of Muslim neo-fundamentalism in Indonesia. This book examines the Masyumi Party from its roots in early 20th-century Muslim reformism to its contemporary legacy, and offers a perspective on political Islam which provides an alternative to the more widely-studied model of Middle-Eastern Islam. The party’s experience teaches us much about the fine line separating a moderate form of Islam open to democracy and a certain degree of secularisation from the sort of religious intransigence which can threaten the country’s denominational coexistence.