“In my view, the circumstances of my resignation as Prime Minister and the realities of modern politics make it very difficult to continue on the backbenches without the risk of becoming a diversion to the important decisions that lie ahead for my successor in Downing Street and the Government,” he said in a statement Monday.
“I fully support Theresa May and have every confidence that Britain will thrive under her strong leadership.
“I now look forward to a life outside of Westminster, but hope to continue to play a part in public service and to make a real and useful contribution to the country I love.”
“I spoke to Theresa May and she was very understanding about this decision,” Cameron told ITV.
“I support her. I support what she’s doing. She’s got off to a cracking start. Obviously I’m going to have my own views about different issues; people would know that. And that’s really the point.
“As a former prime minister it is very difficult, I think, to sit as a backbencher and not be an enormous diversion and distraction from what the government is doing.
“I don’t want to be that distraction. I want Witney to have an MP that can play a full role in parliamentary and political life in a way that I think I would find very difficult, if not impossible.”
Under Cameron’s leadership, the Conservatives won the 2010 general election, ending Labour’s 13 years in government, although the party was forced into entering a coalition government with the Liberal Democrats.
During his time as Prime Minister, he introduced same-sex marriage in 2013 and held off the threat of Scottish independence
after a referendum in 2014.
He led the party to a second consecutive election victory last year but had already declared that he had no intention of staying on for a third term in office.
In the end, Cameron’s undoing was his belief that he could end the constant infighting within the Conservative Party over the UK’s position in Europe.
His decision to call a referendum proved an unnecessary and costly gamble.
He attempted to use the economy to persuade voters that remaining in Europe would be best for Britain. But “Project Fear,”
as it was dubbed by his opponents, failed to resonate with a divided country.
“I’m sure I will be remembered for keeping that pledge to hold a referendum when many people thought that promise would never be kept,” he told ITV.
“But I hope that people will look back at the 11 years I was leader of the Conservative Party and six years as Prime Minister of our country as a time when we did create a stronger economy — 1,000 people found work for every day I was prime minister — and we did make some important social reforms … and the Conservative Party went from being in the doldrums and getting beaten to being a modernizing, winning force in British politics.
“But the historians will have to work all that out. I obviously now am going to be looking at a new life, but I’m only 49 — I hope I can still contribute in terms of public service and contribute to our country.”