Beiner's excellent book is the fruit of more than a dozen years teaching his Horizons course that introduced graduate students to a critical examination of a wide range of twentieth-century political philosophers, some familiar to most students, such as Rawls and Arendt, and some unfamiliar, such as Weil and Löwith. In the 1980s and 1990s, before he taught the course, some of my most enjoyable teaching experiences were team teaching with Beiner courses on Foucault and Heidegger, which provided background for his effort to create a twentieth-century canon in his Horizons course. Beiner has been a steadfast defender of canonicity in a university bent on diluting the core curriculum.