From George Mason's Powerful Words About Liberty:
Because of his seminal recognition that rights do not originate from government, George Mason deserves more attention. In Robert Rutland’s words, he wrote “on behalf of… the birthrights of every free American… man’s native freedom from restraint unless he threatened or did harm to others.” As a consequence, “His ideas became permeating facts” at America’s founding. They need to again permeate Americans’ thoughts if we are to revive the liberty he helped create.
The vision of liberty the founders envisioned will never be seen again, anywhere. Sad. They gave it their best shot, for sure. Freedom and self-reliance go against man's slavish and dependent nature. Being heroic men in a heroic time and place, they overestimated the strengths and virtues in human nature.