Historically, philosophy has either ignored or attacked psychoanalysis. Robyn Ferrell finds such responses neither warranted nor helpful and instead looks toward what psychoanalysis has to offer philosophy. In so doing, he returns with some surprising answers. Concentrating on the work of Freud and Lacan, Ferrell asks why their work had been so influential in European philosophy yet so marginal in the Anglo-American circles. Passion in Theory explores their conception of the relationship between mind and body, and how it provides a key to many current philosophical questions.