Who was Jacques Derrida, and why does he have such a towering, and foreboding reputation across modern philosophy? For some he is the source of the crisis of alternative facts. For far right terrorist Anders Brievik, 'Derridian deconstruction' was the cause for the end of truth. In 1992, 18 philosophers wrote an open letter to the Times to complain when he was awarded an honorary degree by Cambridge University. For others, he is a film star thinker who covered every possible subject...