What made Margaret thatcher stop killing people?

Margaret Thatcher, the former Prime Minister of the United Kingdom, was not involved in killing people. Instead, she is known for her controversial political policies and leadership style during her time in office from 1979 to 1990. If you're referring to her role in political conflicts, such as the Falklands War, her actions were driven by national interests rather than personal violence. Any interpretation of her actions as "killing" would need to be contextualized within the complexities of political decision-making and military engagements.