Joe Biden and Vladimir Putin have just done a very good thing in extending the New Start treaty for five years.

The treaty, signed in 2010 by the US president Barack Obama and Dmitry Medvedev, who was president of Russia at the time, limits each country to no more than 1,550 deployed nuclear warheads and 700 deployed missiles and bombers, and envisages sweeping on-site inspections to verify compliance.

The Guardian

The numbers seem somewhat underwhelming to me (as in, a modest reduction in an enormous nuclear arsenal), but the important thing is the willingness to cooperate to reduce risk, and the message that sends to the rest of the world. The world has gone from believing a nuclear free world might be possible, to trying to avoid proliferation while modestly reducing what nuclear-armed countries already have, to trying to slow the rate of proliferation while “modernizing” or increasing what nuclear-armed countries already have, to teetering on the brink of an all-out arms race. Now we have gone back to the “maintain what we have”, which is still incredibly cynical, but the trend has turned back in the right direction. Accidents, proliferation, unstable nuclear-armed states (I’m talking to you Pakistan), and terrorism are all still very frightening, and there is no margin for error even with one relatively small event one time. The ocean liner captain has seen the iceberg, let up on the steam, and turned the wheel an inch to the left. Is it in time to avoid collision?