A Quote by Carl Sagan

Teller contended, not implausibly, that hydrogen bombs keep the peace, or at least prevent thermonuclear war, because the consequences of warfare between nuclear powers are now too dangerous. We haven't had a nuclear war yet, have we? But all such arguments assume that the nuclear-armed nations are and always will be, without exception, rational actors, and that bouts of anger and revenge and madness will never overtake their leaders (or military and secret police officers in charge of nuclear weapons). In the century of Hitler and Stalin, this seems ingenuous.
What is the only provocation that could bring about the use of nuclear weapons? Nuclear weapons. What is the priority target for nuclear weapons? Nuclear weapons. What is the only established defense against nuclear weapons? Nuclear weapons. How do we prevent the use of nuclear weapons? By threatening to use nuclear weapons. And we can't get rid of nuclear weapons, because of nuclear weapons. The intransigence, it seems, is a function of the weapons themselves.
As a military man who has given half a century of active service I say in all sincerity that the nuclear arms race has no military purpose. Wars cannot be fought with nuclear weapons. Their existence only adds to our perils because of the illusions they have generated. There are powerful voices around the world who still give credence to the old Roman precept - if you desire peace, prepare for war. This is absolute nuclear nonsense.
We have a legal and moral obligation to rid our world of nuclear tests and nuclear weapons. When we put an end to nuclear tests, we get closer to eliminating all nuclear weapons. A world free of nuclear weapons will be safer and more prosperous.
On January 20, 2017, Trump will be sworn in as the 45th president of the United States, and he will be given the nuclear codes and the power to launch the U.S. nuclear arsenal, which is comprised of some 7,000 nuclear weapons. A military officer will always be close to Trump, carrying the nuclear codes in a briefcase known as the "football."
The invasion of Iraq will surely go down in history as one of the most cowardly wars ever fought. It was a war in which a band of rich nations, armed with enough nuclear weapons to destroy the world several times over, rounded on a poor nation, falsely accused it of having nuclear weapons, used the United Nations to force it to disarm, then invaded it, occupied it, and are now in the process of selling it.
Many foolish people believe that nuclear war cannot happen, because there can be no winner. However, the American war planners, who elevated U.S. nuclear weapons from a retaliatory role to a pre-emptive first strike function, obviously do not agree that nuclear war cannot be won.
Five million Jews are regarding me as a traitor, but six billion people around the world think me as a hero and a good man who bring the message to all the human beings that we should survive and prevent the use of nuclear weapons and to prevent the nuclear preparations and to prevent nuclear war in the future.
From the prophets' dreams of the time when nations would beat their swords into plowshares to today's aspirations of a nuclear-weapons-free world, we have sought to avoid armed conflict and not yield to despair in the search for universal peace. The nuclear threats from Iran, North Korea, and terrorists can only be overcome through international cooperation. We call upon Congressional leaders and those worldwide to join together to ensure the fulfillment of these long-overdue initiatives and the achievement of a safer future without nuclear weapons.
I don't want to use the term "nuclear weapons" because those people in Iran who have authority say they are not building nuclear weapons. I make an appeal to the countries who do have nuclear weapons. They don't consider them a nuclear threat. But let's say a country that doesn't have nuclear weapons gets involved in building them, then they are told by those that already have nuclear weapons that they oppose [such a development]. Where is the justice in that?
I, who had been in favour of nuclear energy for generating electricity ... I suddenly realised that anybody who has a nuclear reactor can extract the plutonium from the reactor and make nuclear weapons, so that a country which has a nuclear reactor can, at any moment that it wants to, become a nuclear weapons power. And I, right from the beginning, have been terribly worried by the existence of nuclear weapons and very much against their use.
A nuclear war cannot be won and must never be fought. The only value in our two nations possessing nuclear weapons is to make sure they will never be used. But then would it not be better to do away with them entirely?
...nuclear threats and nuclear weapons are the last argument of weak, stressed and irresponsible politicians. People must act very quicky to stop the movement to nuclear war.
All nuclear weapon states should now recognize that this is so, and declare - in Treaty form - that they will never be the first to use nuclear weapons. This would open the way to the gradual, mutual reduction of nuclear arsenals, down to zero.
I not only saw the possibility of nuclear war, I feared it very much. If they started a military conflagration, it would automatically lead to nuclear warfare.
The lesson of the Cold War is that against nuclear weapons, only nuclear weapons can hold the peace.
My feelings of revulsion and foreboding about nuclear weapons had not changed an iota since 1945, and they have never left me. Since I was 14, the overriding objective of my life has been to prevent the occurrence of nuclear war.
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