Derick Thomson was one of the most influential personalities of Gaelic Scotland in the twentieth century. His poetry counts among the best written in the language; he founded the most important modern Gaelic journal, Gairm, and was the force behind many ventures aimed at the preservation and development of Gaelic. He made major contributions to Gaelic studies as an academic subject and his publications are still indispensable to all working in the field. Thomson's vision of the Gaelic revival is characterised by high standards, organisational and economic shrewdness, openness to second-language users, and broad European outlook. This is the very first book-length study devoted to Thomson and it explores his career within the context of the history of the Gaelic revival in Scotland and other minority-language movements in Europe.