This the first comprehensive study of the Gaelic language in modern Scotland, covering the period from 1872 to the present. It considers in detail the changing role of Gaelic in modern Scotland - from the introduction of state education in 1872 up to the present day - including the policies of government and the work of activists and campaigners who have sought to maintain and promote Gaelic. In addition, it scrutinises the competing ideologies that have driven the decline, marginalisation and subsequent revitalisation of the language. Taking an interdisciplinary approach - at the boundary of history, law, language policy and sociolinguistics - the book draws upon a wide range of sources in both English and Gaelic to consider in detail the development of the language policy regime for Gaelic that was developed between 1975 and 1989. It examines the campaign for the Gaelic Language (Scotland) Act 2005 and analyses its contents and implementation. It also assesses the development and delivery of development and delivery of Gaelic education and media from the late 1980s to the present.