As for libertarian, I've been one all my life, a radical one. You might use the term "philosophical anarchist" or "autarchist" about me, but "libertarian" is easier to define and fits well enough.

1975 Statement to Judith Merrill, who had called herself a democrat and a libertarian, stating that such terms described him as well, as quoted in Robert A. Heinlein : In Dialogue with His Century, Volume 2: The Man Who Learned Better | 1948-1988 (2014), p. 389