Once back in Britain he now abandoned his military career and moved wholly into politics. He soon sat for another seat,
Wendover, and became one of the leaders of the Whig opposition in the House of Commons to
Robert Harley's Tory administration. In particular he opposed the terms of the
Treaty of Utrecht by which Britain unilaterally made peace with France and abandoned its allies. He was a staunch supporter of the
House of Hanover. Once
George I succeeded to the throne following the death of Queen Anne in 1714, he replaced the Tory government with a largely Whig one. Several senior Tories were either imprisoned or fled into exile due to their perceived support of the
Jacobite James Stuart.
Secretary of State In September 1714 he was appointed
Secretary of State for the Southern Department. With
Walpole he provided the leadership of the House of Commons. In early 1715 the new government's position was secured when it won a decisive
election victory. He was mainly responsible for the measures which were instrumental in crushing the
Jacobite rising of 1715. He forwarded the passing of the
Septennial Act in 1716 that established that general elections should be held every seven years. In July 1716 he accompanied George I on his return to Hanover. He acted as George I's foreign minister, and only just failed to conclude a
treaty of alliance with France in 1716. In 1717 there was a dramatic schism in the Whig Party with Stanhope and
Sunderland forming one grouping while Walpole and Townshend opposed them. Walpole led his supporters into opposition, coinciding with a similar dispute within the royal family between George I and his son
George, Prince of Wales. This
Whig Split divided the dominant Whig movement for three years.
Emergence as First Minister In 1717, consequent on changes in the ministry, Stanhope was made
First Lord of the Treasury, and was the last Chancellor of the Exchequer to sit in the House of Lords. A year later he returned to his former office of secretary for the southern department. On 3 July 1717, he was created
Baron Stanhope of Elvaston and
Viscount Stanhope of Mahon and, on 14 April 1718,
Earl Stanhope. He was in all but name
Prime Minister and is sometimes presented as the first Prime Minister of Great Britain, rather than
Sir Robert Walpole who is more usually considered as that figure. Domestically his government suffered a defeat when the
Impeachment of Robert Harley, former first minister, ended in his acquittal in July 1717.
War of the Quadruple Alliance He saw Britain's principal foreign policy goals as containing the threat of Spanish, Austrian or Russian expansionist tendencies. His activity was now shown in the conclusion of the
Quadruple Alliance between Britain, France, Austria and the
United Provinces in 1718, and in obtaining peace for Sweden, when threatened by Russia and Denmark. He entered delicate negotiations with Spain which wished for the return of
Gibraltar, which he was only prepared to do in exchange for
Cuba and
Florida. Ultimately the talks broke down, setting the path to the later
Thirteenth Siege of Gibraltar. In the ensuing
War of the Quadruple Alliance British forces were involved in a campaign to prevent Spanish expansion in Italy. Spain landed troops in Scotland in support of the
Jacobites who they hoped to restore to the throne. The expedition was defeated at the
Battle of Glen Shiel and in retaliation the British dispatched a force that briefly
captured Vigo in October 1719. In the wake of these setbacks Spain agreed to the
Treaty of The Hague the following year. Domestically, he promoted the
Peerage Bill of 1719 to limit the membership of the
House of Lords a controversial move as it was seen as an attack directed at his former Whig colleagues led by Walpole. His attempts at pushing for greater religious toleration were defeated by Walpole's supporters.
South Sea Bubble Just after the collapse of the
South Sea Bubble, for which he was partly responsible but from which he did not profit, the earl was defending his government with customary vigour and panache in House of Lords on 4 February 1721 when he was taken ill with a violent headache. After some apparent recovery the following day, he died of a stroke at eight o'clock that evening. The king was shocked and distraught at the sudden "loss of so able and faithful a minister, of whose service his Majesty had so great need at this critical juncture". On the king's orders Stanhope was given a full military funeral through London on 17 February to
Southwark, and he was afterwards privately buried at
Chevening. He was succeeded by his eldest son Philip (1714–1786), a distinguished mathematician and a fellow of the
Royal Society. ==Reputation==