Thanks. I am interested in naturalizing existentialism, or in cutting through the overcomplicated phenomenological formulations.
I think it would be a little naive, though, to emphasize truth as the crucial component of civilized progress. Since Plato, at least, the Western tradition has had a dual, elitist theory of truth. There's the unvarnished truth for intellectual elites and social outsiders, and there are the noble lies and feel-good stories for the masses who "can't handle" the full truth. Eastern traditions have even more explicit formulations of this double truth doctrine.