I think history is only ever invisible when it abets your sense of self, your desires, your ambitions, when it carries your life along in a kind of frictionless way. History is never invisible, finally, though some people seem to work very hard to be willfully blind. That's too harsh, or too self-righteous: none of us sees history fully; none of us is adequately aware of how the arrangements of the present moment foreclose the possibilities of others to fully live their only lives.