So depressing was the subject of the human condition that humans learnt to avoid even acknowledging its existence, despite the fact that it was the real issue before us as a species. Philosopher Ludwig Wittgenstein made the point in his now-famous line, “About that which we cannot speak, we must remain silent.” (Tractatus Logico-Philosophicus, ch.7, 1921).
Jeremy Griffith – A Species In Denial (introduction)