Thomas hobbes's papers at chatsworth prove that he had considerable knowledge of legal concepts. apparently he used the chatsworth copy of christopher saint german's "doctor" and "student" in developing his concept of contractual obligation. realizing this is useful for a careful analysis of hobbes's theory of why contracts oblige. the crucial problem is hobbes attempt to explain why we should perform a disadvantageous contract. he suggests different motives in all three of his major political works. in "leviathan" he finally settles (...) on the argument that it is always to our long-term advantage to fail to keep contracts. this argument is not very satisfactory, but it is the best that he can come up with given his account of human nature. (shrink)