Abstract
In this paper I will explore certain key features of Francisco Suarez's account of God's action in the world, with an eye toward explaining his view of the precise way in which God concurs with--that is, makes an immediate causal contribution to--free action in general and sinful action in particular. Suarez agrees with his mainly Thomistic opponents that God is an immediate cause of every effect produced by creatures--including every free act and, a fortiori , every sinful act elicited by creatures with a rational or 'free' nature. But he differs markedly from them in his account of how it can be plausibly maintained that God permits sin without causing sin or, to put it somewhat differently, how it can be plausibly maintained that the moral defectiveness of a sin is not traceable to God as a source.