Hume's (Ad Hoc?) Appeal to the Calm Passions

Hume argues that whenever we seem to be motivated by reason, there are unnoticed calm passions that play this role instead, a move is that is often criticised as ad hoc (e.g. Stroud 1977 and Cohon 2008). In response, some commentators propose a conceptual rather than empirical reading of Hume’s conativist thesis, either as a departure from Hume (Stroud 1977), or as an interpretation or rational reconstruction (Bricke 1996). I argue that conceptual accounts face a dilemma: either they render the conativist thesis trivial, or they violate Hume's thesis that 'a priori, any thing may produce any thing'. I defend an empirical construal of Hume’s conativist thesis. I provide two theoretical frameworks within which Hume’s appeal to the calm passions may be justified: first, by the framework of theoretical virtues, and secondly, by lights of his own ‘rules by which to judge of causes and effects’ (THN 1.3.15)