Aristotle, one of the greatest philosophers of all time, a teacher of world leader Alexander the Great, and a prolific writer on a variety of subjects we might not think related to philosophy, provides important information on ancient politics. He distinguishes between good and bad forms of ruling in all the basic systems; thus there are good and bad forms of the rule by one (mon-archy), a few (olig-archy, arist-ocracy), or many (dem-ocracy). For Aristotle, democracy is not the best form of government. As is also true of oligarchy and monarchy, rule in a democracy is for and by the people named in the government type. In a democracy, rule is by and for the needy. In contrast, rule of law or aristocracy (literally, power [rule] of the best) or even monarchy, where the ruler has the interest of his country at heart, are better types of government.