This paper explores Erich Fromm’s concept of humanism, arguing that it provides us with a unified theory for both clinical work as well as social criticism. Fromm’s humanistic ideas are rooted in a structure of thought that sees our existence, our ontology as human beings, as constituted by our inherent capacities for both relatedness as well as positing ends and purposes in the world. By cultivating a self-awareness of these dual capacities, we can achieve a state of freedom, a self-consciousness of our capacity to shape our reality as opposed to conforming ourselves to it. In this way, Fromm’s ideas constitute a critical humanism that can be realized in the world via self- and social transformation and not merely an abstract set of principles or concepts.