The book offers a critical account of how utopian thinking became defeated as a tool of philosophy whose explicit objective has been to not only analyse but emancipate the world. While such philosophy was originally inseparable from ideas of a radically better society it aimed to realise, many of its most influential practitioners today object to the use of utopian ideas. Countering this scepticism, the book argues in favour of utopian thinking. By elucidating a concept of utopia freed of its alleged pitfalls, the book contends that utopian thinking indeed presents an important resource for achieving emancipatory social goals.