""An intriguing study with a quite synthetic thesis and extremely erudite analysis. Will be of interest to a wide range of scholars: historians of medicine, science, sexuality, various branches of philosophy, as well as cultural and social historians of Europe.""--Robert Beachy, author of Gay Berlin: Birthplace of a Modern Identity ""Ralph Leck tackles the contributions of Karl Heinrich Ulrichs to sexual science with erudition and passion. Vita Sexualis gives Ulrichs his rightful place in the story of the struggle to conceptualize homosexuality as a natural sexual variation and to forge a politics of inclusion and equality for sexual minorities. No one interested in the history of sexual thought can afford to miss this book.""--Leila J. Rupp, author of Sapphistries: A Global History of Love between Women