Thomas Jefferson advocated for a system of public education. He proposed “A Bill for the More General Diffusion of Knowledge.”

Whereas it appeareth that however certain forms of government are better calculated than others to protect individuals in the free exercise of their natural rights, and are at the same time themselves better guarded against degeneracy, yet experience hath shewn, that even under the best forms, those entrusted with power have, in time, and by slow operations, perverted it into tyranny; and it is believed that the most effectual means of preventing this would be, 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 exhibiteth, 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; And whereas it is generally true that that people will be happiest whose laws are best, and are best administered, and that laws will be wisely formed, and honestly administered, in proportion as those who form and administer them are wise and honest; whence it becomes expedient for promoting the publick happiness that those person, whom nature hath endowed with genius and virtue, should be rendered by liberal education worthy to receive, and able to guard the sacred deposit of the rights and liberties of their fellow citizens, and that they should be called to that charge without regard to wealth, birth or other accidental condition or circumstance; but the indigence of the greater number disabling them from so educating, at their own expence, those of their children whom nature hath fitly formed and disposed to become useful instruments for the public, it is better that such should be sought for and educated at the common expence of all, than that the happiness of all should be confided to the weak or wicked:…

Note that one of the chief functions of education was to arm the populace with knowledge to protect themselves against the potential tyranny of the powerful. Note also that he recognized that most parents would not be able to afford to educate, and that education “should be sought for an educated at the common expense of all…”

Jefferson had his limitations. He was a slave owner. He did not advocate for the education of black children. But he understood that education is a fundamental institution in a society that hopes to be democratic and that it must be public education, paid for by all.