The most effectual means of preventing the perversion of power into tyranny are to illuminate, as far as practicable, the minds of the people at large, and more especially to give them knowledge of those facts which history exhibits, that possessed thereby of the experience of other ages and countries, they may be enabled to know ambition under all its shapes, and prompt to exert their natural powers to defeat its purposes.

The Real Thomas Jefferson (ed. Natl Center for Constitutional, 1983)