Agent-causalism or the agency theory is the thesis that agents qua objects/substances cause at least some of their decisions (or at least their coming to have an intention that is constitutive of a decision). In this paper, I examine the tenability of an attractive agentcausal account of the metaphysics of the springs of free action developed and defended in the recent work of Timothy O'Connor. Against the backdrop of recent work on causal powers in ontology, I argue that, however attractive the account, O'Connor's agent-causal theory of free agency is ultimately untenable. 3 I agree, however, with John Bishop (1989) that agent-causation is conceptually irreducible. (Like me, Bishop argues that agent-causation is ontologically reducible, but for reasons different from those offered in this paper.) So my goal here, like Bishop's, is not to offer a conceptual or linguistic analysis of 'agent-causation.' Rather, I wish to examine what agent-causation is.