This is my answer to this Q which is on Quora.
If I were the Prime Minister of the United Kingdom, which is a country with nuclear weapons, which you would have to be equipped with in order to answer the question I would state this:
“Nuclear weapons have only one purpose and that is to kill in the millions. The only deterrent they have been is to ensure those Nations with Nuclear Weapons do not make a sudden decision to use them on other Nations with nuclear weapons.
They did not stop Al Qaeda killing 3000 Americans at 911 and they did not stop the Vietnam War or ISIS invading Syria and Iraq. I would use them at the negotiating table to provide a framework with other countries to discuss and achieve a planned and phased reduction in nuclear weapons. Which is a forum much promised but lacking in delivery.
However, if my only option to end an immediate threat to the United Kingdom from a nuclear military force was to use them specifically to bring an immediate end to the threat I would do so. It is highly unlikely that such a threat would involve one million civilians. It is also highly unlikely that such a situation would occur without any of the United Kingdom’s allies being involved. Therefore the question is too hypothetical to consider a more detailed response”.
I would also state that the United Kingdom as an Island is at much more of a risk from a hostile force than the majority of developed Nations. An island is a strategic target and one which is between Europe and the United States even more so. Unless we are able to ensure we know where every Nuclear Weapon in the World is there can never be a complete nuclear disarmament.
Theresa May did not give that answer. Without thinking May said ‘I would’ to the question by Jeremy Corbyn of would she kill 100,000 with a nuclear strike.
Let us hope that Theresa May is able to ‘think’ when faced with a real situation of a ‘United Kingdom under threat’.
There can be no everlasting Peace that comes about with the death of a million people. The deaths of one million people and more occured in 1914–1918 and 1939–1945 with no everlasting Peace.
1.5 million have died in Afghanistan since 1979. A negotiated Peace for the war weary people of Afghanistan is as distant as it has ever been.
If the World wants everlasting Peace then it must begin with the reform of the United Nations. The Security Council must be expanded, the veto dropped and every conflict dealt with by not taking sides.