Gordon Brown served as Prime Minister of Great Britain and Northern Ireland from June 2007 to May 2010. As Prime Minister, Brown made major changes to how Britain tackles health, education, defense, crime, energy and foreign policy. He is widely credited with preventing a second great depression through his negotiation of the global deal at the London Summit—a meeting of the G20—which he hosted in the middle of the financial crisis. Prior to serving as Prime Minister, he had served as Chancellor of the Exchequer in 1997 and held that position until 2007, making him the longest active Chancellor in modern history. During his ten years at the head of the treasury, he presided over the longest ever period of growth, made the Bank of England independent and delivered an agreement to support the world’s poorest countries and tackle climate change. Brown is currently working on a book focusing on the monetary crisis, global trade and the next stage of globalization.