Montesquieu

http://en.wikipedia.org/wiki/Montesquieu
http://plato.stanford.edu/entries/montesquieu/
http://www.rjgeib.com/thoughts/montesquieu/montesquieu.html
http://www.newadvent.org/cathen/10536a.htm
http://oregonstate.edu/instruct/phl302/philosophers/montesquieu.html
http://en.wikiquote.org/wiki/Charles_de_Montesquieu