Sins of omission and myths of the Enlightenment.

The world is back to where it was in the late 19th century — no one great power controls everything on the planet, not the US and not China. And that makes the threat of war inescapable.

The guru of Gaia is a maverick environmentalist who supports fracking and nuclear power. Does he believe the human race has a future?

Political violence, past and present.