The purpose of this chapter is to present and motivate a projectivist interpretation of Hume on causation. While Simon Blackburn holds that Hume is a projectivist about causation (see, for example, Blackburn 1984: 210-12; 1993a: 55-7; 1993b: 178-80; 2000: 107-11) and a projectivist interpretation is sometimes mentioned by other authors (see, for example, Craig 2000), it has not, so far as I know, been either articulated or criticized in much detail. I shall talk about ‘the projectivist interpretation’ as though it were an established interpretative option, but in fact it is not (yet); the point of this chapter is to put some flesh on the bones.