[...] Derrida is clearly out to do more than develop new techniques of reading: deconstruction is for him an ultimately political practice, an attempt to dismantle the logic by which a particular system of thought, and behind that a whole system of political structures and social institutions, maintains its force. He is not seeking, absurdly, to deny the existence of relatively determinate truths, meanings, identities, intentions, historical continuities; he is seeking rather to see such things as the effects of a wider and deeper history--of language, of the unconscious, of social institutions and practices. [...]