During his career, he has worked to stop big businesses and very rich people avoiding tax. He has been an anti-war and anti-nuclear activist. Corbyn supports a foreign policy of military non-interventionism and a unilateral policy of nuclear disarmament. This means he wants all countries to stop building nuclear weapons. Corbyn is a member of the Socialist Campaign Group, the Palestine Solidarity Campaign, Amnesty International and the Campaign for Nuclear Disarmament (CND). He was the national chair of the Stop the War Coalition from June 2011 until September 2015.