James Grenville was a British

Kingdom of Great Britain

The former Kingdom of Great Britain, sometimes described as the 'United Kingdom of Great Britain', That the Two Kingdoms of Scotland and England, shall upon the 1st May next ensuing the date hereof, and forever after, be United into One Kingdom by the Name of GREAT BRITAIN. was a sovereign...

 politician

Politician

A politician, political leader, or political figure is an individual who is involved in influencing public policy and decision making...

.

He was born at Wotton

Wotton

Wotton may refer to:Places*Wotton, Devon*Wotton, Gloucester*Wotton, Surrey**Wotton House, Surrey, a Grade II listed building. Originally a country house and the seat of the Evelyn family, it is now a training and conference centre....

 in 1715 into the influential Grenville political family and was one of five brothers who went into politics. He was the son of Richard Grenville, a prominent Buckinghamshire

Buckinghamshire

Buckinghamshire is a ceremonial and non-metropolitan home county in South East England. The county town is Aylesbury, the largest town in the ceremonial county is Milton Keynes and largest town in the non-metropolitan county is High Wycombe....

 politician.

He was first elected as a Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 in 1741 on the slate of Lord Cobham

Richard Temple, 1st Viscount Cobham

Field Marshal Richard Temple, 1st Viscount Cobham PC was a British soldier and Whig politician. He was known for his ownership of and modifications to the estate at Stowe and for serving as a political mentor to the young William Pitt.-Early life:Temple was the son of Sir Richard Temple, 3rd...

 and he served as one of Cobham's Cubs during his early years in parliament. In 1746 he was given a position at the Board of Trade

Board of Trade

The Board of Trade is a committee of the Privy Council of the United Kingdom, originating as a committee of inquiry in the 17th century and evolving gradually into a government department with a diverse range of functions...

. From 1756 to 1761, under Pitt, he was a junior Lord of the Treasury

Lord of the Treasury

In the United Kingdom, there are at least six Lords of the Treasury who serve concurrently. Traditionally, this board consists of the First Lord of the Treasury, the Second Lord of the Treasury, and four or more junior lords .Strictly they are commissioners for exercising the office of Lord...

.

In October 1761 following his brother-in-law William Pitt

William Pitt, 1st Earl of Chatham

William Pitt, 1st Earl of Chatham PC was a British Whig statesman who led Britain during the Seven Years' War...

's resignation, James Grenville resigned along with him and went into opposition. He later oversaw the reconciliation between George Grenville

George Grenville

George Grenville was a British Whig statesman who rose to the position of Prime Minister of Great Britain. Grenville was born into an influential political family and first entered Parliament in 1741 as an MP for Buckingham...

, who had caused a rift with his family by not resigning, and their eldest brother Richard Grenville-Temple, 2nd Earl Temple

Richard Grenville-Temple, 2nd Earl Temple

Richard Grenville-Temple, 2nd Earl Temple KG, PC was a British politician. He is best known for his association with his brother-in-law William Pitt who he served with in government during Britain's participation in the Seven Years War between 1756 and 1761...

a close ally of Pitt.