Olli Koistinen is Professor at the department of Philosophy, Department of Philosophy, Contemporary History, and Political Science at the University of Turku, Finland. He works mainly on early modern philosophy and has published papers on Descartes, Spinoza, Leibniz, and Kant. He also works on contemporary metaphysics, especially action theory, a subject on which he has published a monograph. During his stay at CAS, Koistinen’s work will focus on a manuscript on Spinoza. This manuscript contends that Kant inherited much from Spinoza and that attending to Spinoza’s Ethica helps clarify the problems that Kant addresses in his Critique of Pure Reason.