Alvarez and Steward think the power of agency is a two-way power; Lowe thinks the will is. There is a problem for two-way powers. Either there is a unified description of the manifestation-type of the power, or not. If so, two-way powers are really one-way powers. If not, two-way powers are really combinations of one-way powers. Either way, two-way powers cannot help distinguish free agents from everything else. I argue the problem is best avoided by an Aristotelian view, which posits (...) a distinctive unity of explanation proper to two-way powers, grounded in a distinctive form of reasoning. (shrink)

In this paper I propose a way of characterizing human agency in terms of the concept of a two‐way power. I outline this conception of agency, defend it against some objections, and briefly indicate how it relates to free agency and to moral praise‐ and blameworthiness.

Helen Steward argues that determinism is incompatible with agency itself--not only the special human variety of agency, but also powers which can be accorded to animal agents. She offers a distinctive, non-dualistic version of libertarianism, rooted in a conception of what biological forms of organisation might make possible in the way of freedom.