Aristotle's NE X claim that the best human life is one devoted to contemplation (theoria) seems in tension with his emphasis elsewhere on our essentially political nature, and more specifically, his claim that friendship is necessary for our flourishing. For, if our good can be in principle realized apart from the human community, there seems little reason to suggest we 'need' friends, as he clearly does in NE VIII & IX. I argue that central to Aristotle's NE X discussion of contemplation is the claim that our chief good accords with whatever is 'most divine' in us, viz. our rational nature (NE 1177b2-18). Thus, the best human life involves the excellent exercise of our rational capacities. I distinguish two ways in which human beings flour...