"This book offers a new narrative about Spinoza's moral philosophy and his account of reason, passions and social cooperation. Spinoza's views significantly evolved over time. In his early writings, Spinoza's account of ethical progress towards the Supreme Good relies mostly on the idea that the mind can build on its innate knowledge to resist the power of the passions. Although appropriate social conditions may support the individual's pursuit of the Supreme Good, achieving it does not depend essentially on social factors. In Spinoza's later writings, however, the emphasis shifts towards the mind's need to rely on appropriate forms of social cooperation. Reason becomes the mental expression of the way the human body interacts with external causes on the basis of some degree of agreement in nature with them. The greater the agreement, the greater the power of reason to adequately understand universal features as well as more specific traits of the external causes. In the case of human beings, certain kinds of social cooperation are crucial for the development of reason. This view has crucial ramifications for Spinoza's account of how individuals can progress towards the Supreme Good and how a political science based on Spinoza's principles can contribute to this goal"--