able to such cooperation. For example, the first law is to seek peace and fol-
low it and to defend ourselves as necessary; the second says that a man
should be willing, when others are too, to lay down his right to all things,
and be contented with as much liberty against other men as he would allow
other men against himself; the third concerns honoring our covenants. The
fourth through the tenth all have to do with one virtue or another involv-
ing cooperation: gratitude, accommodation to others, forgiveness and par-
don; not showing contempt for other people, acknowledging others as
equals, and the like. The 10th Law of Nature says not to reserve to our-
selves a right we are not content that others should have as well, and so on.
All have to do with the precepts of cooperation necessary for social life and
a peaceful society (Leviathan, Chapters 14 and 15). But these reasonable prin-
ciples, Hobbes urges, are rational for us to follow, on the condition that oth-
ers follow them likewise. The role of the Sovereign is in part to guarantee
that (enough) others follow them, so that it is rational for each to follow
them. Thus Hobbes justifies Reasonable principles (with reasonable content)
in terms of the Rational.
Hobbes, however, urges that it is rational for us to follow these reason-
able principles, only on the condition that others also follow them. They
will help us to achieve our own good. In other words, he is making an argu-
ment to the effect that this group of principles that we could accept as rea-
sonable, in my sense of that term, are rational principles for us to follow,
based on our fundamental interests, provided others follow them also. The
appeal is to what is conducive to our self-preservation, conjugal affections,
and means for commodious living, or in other words, to our own essential
good. The role of the Sovereign is then, in part, to guarantee that enough
others follow the laws of nature so that it is rational for us to follow them
also, thus ensuring peace.
Later we will take up the social contract and what that actually does,
which is to set up the Sovereign with sufficient powers to effectively achieve
the conditions necessary to such a guarantee. The existence of the Sover-
eign changes the circumstances in such a way that there are no longer rea-
sonable grounds, or rational grounds, for not complying with the laws of
nature. But, the difficulty, which Hobbes, I believe, was one of the first to
see, is that within the state of nature itself, it is hard to see how such agency
could exist that would make it rational to make or to follow through on our
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Hobbes’s Account of Practical Reasoning
Copyright © The President and Fellows of Harvard College
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