This book takes up the agenda of the late (but unknown) L. S. Vygotsky, who had turned to the philosopher Spinoza to develop a holistic approach to psychology, an approach that no longer dichotomized the body and mind, intellect and affect, or the individual and the social. In this approach, there is only one substance, which manifests itself in different ways in the thinking body, including as biology and culture. The manifestation as culture is premised on the existence of the social.