Skip to Navigation
Skip to Content

Support PSR!

Make a difference in the challenge to confront global warming and prevent nuclear war and the development and use of nuclear weapons.

Donate Now »

Take Action

We have two weeks left until the Senate is expected to vote on the Iran deal, your Senator is undecided, and we need every possible vote we can get. Please call now and urge your Senator to vote "yes" for the Iran deal.

Consequences of a Single Failure of Nuclear Deterrence

PSR Senior Scientist Steven Starr, February 2011

Only a single failure of nuclear deterrence is required to start a nuclear war, and the consequences of such a failure would be profound. Peer-reviewed studies predict that less than 1% of the nuclear weapons now deployed in the arsenals of the Nuclear Weapon States, if detonated in urban areas, would immediately kill tens of millions of people, and cause long-term, catastrophic disruptions of the global climate and massive destruction of Earth’s protective ozone layer.

Download

Browse Resources

Action Alerts

More action alertsĀ»

Resources

In the Spotlight