Short answers, pulled from the story.
David Cameron became Prime Minister of the United Kingdom on the 11th of May 2010 at the age of 43. He was the youngest British Prime Minister since Lord Liverpool in 1812 when he took office.
David Cameron implemented significant social reforms including the legalization of same-sex marriage in England and Wales and the introduction of the pupil premium. His government also enacted legislation to support care leavers up to the age of 25 and introduced the Big Society initiative to empower communities.
David Cameron resigned as Prime Minister following the result of the referendum on the UK's membership of the European Union held on the 23rd of June 2016. The Leave campaign won with approximately 52% of the vote, leading Cameron to step down by the start of the Conservative Party Conference in October 2016.
David Cameron played a pivotal role in the NATO-led intervention in Libya in 2011 to protect civilians from Muammar Gaddafi. He also authorized military action against the Islamic State in Syria and secured parliamentary approval for air strikes against IS targets in 2015 following the terrorist attacks in Paris.
The coalition government between the Conservatives and the Liberal Democrats formed in May 2010 was the first such arrangement since 1945. It resulted in a hung parliament and the implementation of a rigorous austerity program designed to reduce the budget deficit and restore economic stability.
After leaving office, David Cameron served as president of Alzheimer's Research UK from 2017 to 2023 and returned to public life as Foreign Secretary under Rishi Sunak in 2023. He retired as Foreign Secretary after the Conservatives lost the 2024 general election to the Labour Party but maintained his House of Lords seat as Baron Cameron of Chipping Norton.