This volume brings together a group of 14 essays on five problems of freedom and nine philosophers, contributing to the history of philosophy, and offers a concise survey of the question of freedom. It approaches this question in several ways, exploring the problems of freedom, the freedom of philosophers, and the paradoxes of freedom. The topics of these essays were chosen because of a personal, but also universal, interest: the problem of freedom makes the human condition paradoxical. We always find ourselves faced with the same structure of this paradox: a freedom which cannot be freed from its relation to necessity. Freedom is, therefore, not really free. The paradox of freedom is, thus, that of the human condition: human freedom is as paradoxical as the human condition is incomprehensible.