 Cavendish disagrees with Hobbes on a number of questions of natural philosophy. For Hobbes, thoughts and sensations are motions in the brain (Hobbes 1651, 27–28). For Cavendish thinking and intelligence are basic features of bodies – they are basic features that are ubiquitous in nature and that admit of no further explanation. Nor would Hobbes agree with Cavendish that when bodies interact their rational elements communicate with each other and co-ordinate their behavior. But on questions of social and political philosophy Cavendish and Hobbes to a significant degree align. Like Hobbes, Cavendish holds that human beings are primarily motivated by self-interest: