  Jeremy Bentham (1748–1832) was influenced both by Hobbes' account of human nature and Hume's account of social utility. He famously held that humans were ruled by two sovereign masters — pleasure and pain. We seek pleasure and the avoidance of pain, they “…govern us in all we do, in all we say, in all we think…” (Bentham PML, 1). Yet he also promulgated the principle of utility as the standard of right action on the part of governments and individuals. Actions are approved when they are such as to promote happiness, or pleasure, and disapproved of when they have a tendency to cause unhappiness, or pain (PML). Combine this criterion of rightness with a view that we should be actively trying to promote overall happiness, and one has a serious incompatibility with psychological egoism. Thus, his apparent endorsement of Hobbesian psychological egoism created problems in understanding his moral theory since psychological egoism rules out acting to promote the overall well-being when that it is incompatible with one's own. For the psychological egoist, that is not even a possibility. So, given ‘ought implies can’ it would follow that we are not obligated to act to promote overall well-being when that is incompatible with our own. This generates a serious tension in Bentham's thought, one that was drawn to his attention. He sometimes seemed to think that he could reconcile the two commitments empirically, that is, by noting that when people act to promote the good they are helping themselves, too. But this claim only serves to muddy the waters, since the standard understanding of psychological egoism  —  and Bentham's own statement of his view  —  identifies motives of action which are self-interested. Yet this seems, again, in conflict with his own specification of the method for making moral decisions which is not to focus on self-interest  —  indeed, the addition of extent as a parameter along which to measure pleasure produced distinguishes this approach from ethical egoism. Aware of the difficulty, in later years he seemed to pull back from a full-fledged commitment to psychological egoism, admitting that people do sometimes act benevolently — with the overall good of humanity in mind.