Professional dissident …

… Derrida: A Biography by Benoît Peeters - review | Books | The Guardian. (Hat tip, Dave Lull.)

Deconstruction holds that nothing is ever entirely itself. There is a certain otherness lurking within every assured identity. It seizes on the out-of-place element in a system, and uses it to show how the system is never quite as stable as it imagines. There is something within any structure that is part of it but also escapes its logic. It comes as no surprise that the author of these ideas was a Sephardic Jew from colonial Algeria, half in and half out of French society. If his language was French, he could also speak the patois of working-class Arabs. He would later return to his home country as a conscript in the French army, a classic instance of divided identity.