Thomas Jefferson and John Adams concurred on the following preference—namely, a natural aristocracy of virtue and talent over the artificial sort of birth and wealth. Talent here is not merely skill, but also knowledge. Hence the two former U.S. presidents agreed that citizens ought to be given a broad basic education in free schools. The corollary is that as a citizenry lapses in virtue and knowledge, decadence will show up in public discourse and consequently public policy. If kept unchecked, the tendency is for the republic to fall.
The full essay is at "Partisanship over Education and Virtue."