James Callaghan, also known as the Baron Callaghan of Cardiff, was the Prime Minister of the United Kingdom from 1976 to 1979. He was also the only person to have occupied the four Great Offices of State—the Exchequer, the Home Office, the Foreign Office and that of the Prime Minister. One of the longest serving members of the House of Commons, he was known to have been an engaging personality and was a political ‘kahuna’. He began his career working as a tax inspector and slowly ascended the political ladder. He donned many roles - a volunteer with the Royal Navy, an Ordinary Seaman, a Lieutenant and then, a politician. During his tenure as the Chancellor of Exchequer, he introduced the important capital gains tax and helped stabilize the financial market in the country. After having faced a tough period during the Middle East crisis, he resigned as the Chancellor and later went on to become the Home Secretary. A strong advocator of the Labour-Trade Union Link, he was appointed as foreign secretary for his adept decision making skills and efficient management.