“As long as weapons of mass destruction exist, primarily nuclear weapons, the danger is colossal. All nations should declare... that nuclear weapons must be destroyed. This is to save ourselves and our planet.”
Quoted in https://www.bbc.com/news/av/world-europe-50265870/mikhail-gorbachev-tells-the-bbc-world-in-colossal-danger Mikhail Gorbachev tells the BBC: World in ‘colossal danger’, BBC World News,(4 November 2019)
2000s
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Mikhail Gorbachev 65
General Secretary of the Communist Party of the Soviet Union 1931Related quotes

Nobel lecture (2005)
Context: As long as some of us choose to rely on nuclear weapons, we continue to risk that these same weapons will become increasingly attractive to others.
I have no doubt that, if we hope to escape self-destruction, then nuclear weapons should have no place in our collective conscience, and no role in our security.
To that end, we must ensure — absolutely — that no more countries acquire these deadly weapons.
We must see to it that nuclear-weapon states take concrete steps towards nuclear disarmament.
And we must put in place a security system that does not rely on nuclear deterrence.

News conference http://www.guardian.co.uk/Iraq/Story/0,2763,810093,00.html with then British Prime Minister Tony Blair, October 2002.
2000 - 2005

"Peace as a Civil Right" from A Prayer for America (2003) [Nation Books, ISBN 1-56025-510-2], p. 76

Ziaur Rahman's speech in the United Nations Security Council.
Ziaur Rahman in the United Nations - YouTube, 2012-05-30 http://www.youtube.com/watch?v=QASYSWMbDtg,

Nobel Peace prize acceptance speech (1985)
Context: I am convinced that today is a great and exciting day not only for the members of our international movement but also for all physicians on our planet, irrespective of their political and religious beliefs. For the first time in history, their selfless service for the cause of maintaining life on Earth is marked by the high Nobel Prize. True to the Hippocratic Oath, we cannot keep silent knowing what final epidemic-nuclear war — can bring to humankind. The bell of Hiroshima rings in our hearts not as a funeral knell, but as an alarm bell calling out to actions to protect life on our planet.
We were among the first to demolish the nuclear illusions that existed and to unveil the true face of nuclear weapons — the weapons of genocide. We warned the peoples and governments that medicine would be helpless to offer even minimal relief to the hundreds of millions of victims of nuclear war.
However, our contacts with patients inspire our faith in the human reason. Peoples are heedful of the voice of physicians who warn them of the danger and recommend the means of prevention.

The Tribune (28 March 1986).
1980s

“The arms race is a race between nuclear weapons and ourselves.”
"Introduction: Thinkability"
Einstein's Monsters (1987)

“All nations share a linked destiny; nuclear weapons are their shared enemy.”
A Prescription for Hope (1985)
Context: Combatting the nuclear threat has been our exclusive preoccupation, since we are dedicated to the proposition that to insure the conditions of life, we must prevent the conditions of death. Ultimately, we believe people must come to terms with the fact that the struggle is not between different national destinies, between opposing ideologies, but rather between catastrophe and survival. All nations share a linked destiny; nuclear weapons are their shared enemy.

Jeremy Corbyn row after 'I'd not fire nuclear weapons' comment https://www.bbc.co.uk/news/uk-politics-34399565, BBC News, 30 September 2015
2010s, 2015