TROGLODYTE, n.
Specifically, a cave-dweller of the paleolithic period, after the Tree and before the Flat. A famous community of troglodytes dwelt with David in the Cave of Adullam. The colony consisted of "every one that was in distress, and every one that was in debt, and every one that was discontented"--in brief, all the Socialists of Judah.
--Ambrose Bierce - The Devil's Dictionary