Hobbes thus infers from his mechanistic theory of human nature that humans are necessarily and exclusively self-interested. All men pursue only what they perceive to be in their own individually considered best interests. They respond mechanistically by being drawn to that which they desire and repelled by that to which they are averse. In addition to being exclusively self-interested, Hobbes also argues that human beings are reasonable. They have in them the rational capacity to pursue their desires as efficiently and maximally as possible