19.4. 4. Of the general Spirit of Mankind.
Mankind are influenced by
various causes: by the climate, by the religion, by the laws, by the
maxims of government, by precedents, morals, and customs; whence is
formed a general spirit of nations.
In proportion as, in every country, any one of these causes acts
with more force, the others in the same degree are weakened. Nature and
the climate rule almost alone over the savages; customs govern the
Chinese; the laws tyrannise in Japan; morals had formerly all their
influence at Sparta; maxims of government, and the ancient simplicity of
manners, once prevailed at Rome.