We've had compulsory education is most states for nearly 100 years, but there was public education in the United States before it was even a sovereign nation, and most state constitutions say that a major function of the state government is public education.
SoftballMom, weren't you the one with the long list of Thomas Jefferson quotes on why public education was a necessity for a free society?
Not that we are in a better spot now. Maybe we would all be better to go to plows and horses and let the rest of the world go to hell in a handbasket - except I don't think the oceans are the protectors they once were