This engaging volume sheds light on the central role the turn to the body plays in the philosophies of Spinoza and Nietzsche, providing an ideal starting point for understanding their work. Ioan explores their critiques of traditional morality, as well as their accounts of ethics, freedom and politics, arguing that we can best compare their respective philosophical physiologies, and their broader philosophical positions, through their shared interest in the notion of power. In spite of significant differences, Ioan shows the ways in which the two thinkers share remarkable similarities, delving into their emphatic appeal to the body as the key to solving fundamental philosophical problems, both theoretical and practical.