Humans lived for several million years as fully wild beings: only in the last 10, 000 did we invent agriculture; only in the last couple of centuries did we invent industry. We are a species that has spent 99 per cent of its history as hunter-gatherers. We haven't had time for our unconscious minds and our unconscious needs to have changed. If you like, our souls have not changed, and this is true whether or not we believe that we have them.