This short book contrasts the philosophies of technology of Heidegger and Marcuse, one of Heidegger's star pupils, and relates their work to contemporary technology studies. Feenberg sets out the historical and theoretical background of the debate, then discusses each philosopher's theory in turn, and ends with an important analysis of the implications for contemporary technology studies. Although Heidegger's work in the philosophy of technology is widely discussed and has already been addressed in a handful of books, Marcuse's work has been largely overlooked. This book will be the first to critically engage Marcuse as a philosopher of technology, and as such is sure to make an important impact on the field.