"I don't think it's just a case of us getting soft and decadent, like the late Roman Empire, although we probably are. I don't fear that a fit race of barbarians are going to swarm in and conquer us, while we're stoned out of our skulls and piling on weight in front of the telly with takeaway pizzas. I think that it is we who are the barbarians. The barbarians aren't at the gate. They are already among us. They are thronging the shopping malls and discos. The only way to escape them is to go into a second-hand bookshop. It is our own fault. Actually, it's probably all my fault as usual ... "