The truth emerging from this scattered picture of nuclear proliferation is simple: there is a stronger chance of a nuclear bomb being used now than at almost any point in the Cold War.

The truth emerging from this scattered picture of nuclear proliferation is simple: there is a stronger chance of a nuclear bomb being used now than at almost any point in the Cold War.

Your working assumption, when you meet a homophobe, should be that they are gay.

The climate-change deniers are rapidly ending up with as much intellectual credibility as creationists and Flat Earthers. They are nudging close to having the moral credibility of Holocaust deniers.

There is an emerging scientific consensus that global warming is making hurricanes more intense and more destructive. It turns out that Katrina fits into a pattern that scientists and greens have been trying to warn us about for a long time.

The bombs held in current nuclear arsenals are seventy times more powerful than the bomb dropped on Nagasaki. If we don't begin opposing the drift towards more and more of them, we will live in the shadow of the mushroom cloud for the rest of our lives - and millions may die there.

All people deserve respect, but not all ideas do.