This document provides an overview of Jacques Derrida's philosophical concepts and their influences. It summarizes 12 key concepts:
1) Écriture and Pharmakon - Derrida analyzed the dual nature of writing as both medicine and poison based on Plato's Phaedrus.
2) Deconstruction - Derrida proposed that meaning is unstable and open to new interpretations, not determined by authorial intent.
3) Differance - Derrida's term for how meaning is deferred and produced through differences in language.
4) Key influences on Derrida's thinking included Marxism, Darwinism, and Freudianism. He drew parallels between their concepts