He was the son of
Sholto Douglas, 15th Earl of Morton, and Katherine Hamilton. He succeeded to the title Earl of Morton in 1774 aged only thirteen, following the death of his father. He was sent to
Eton College to be educated. Following his education he conducted a Grand Tour of Europe, as was the fashion of the day, and visited most of the European Courts. He was elected a
Fellow of the Royal Society in February 1785. His proposers were
Daniel Rutherford,
John Robison, and Alexander Keith. He served as vice-president of the
Royal Society of London occasionally from 1795 to 1819, if
Joseph Banks was unavailable. The Earl was a frequent member of the Royal Company of Archers. Also, he had an interest in
horse breeding and was noted for his attempts to breed a
quagga. He served as a representative peer from 1784 to 1790 and as
Queen's Chamberlain 1792 to 1818. He was also
Lord Lieutenant of
Fife from 1808 to 1824. He was also
Lord High Commissioner to the General Assembly of the Church of Scotland. On 11 August 1791 he was created
Baron Douglas of Loch Leven, in the
County of Kinross. Thereafter he took a seat in the
House of Lords between
Lord Howard de Walden and
Lord Walsingham. He was knighted at
St. James's Palace in 1797 as a
Knight of the Thistle. During a debate in the House of Lords on 5 February 1807 over the proposed
Slave Trade Act 1807, which would abolish British involvement in the
Atlantic slave trade, he stated his opposition to the bill and "recommended to their lordships to pause, and to consider whether the abolition of the trade would not be attended with worse consequences in the view of humanity, than its continuation". He died at the family estate of
Dalmahoy House on 17 July 1827. ==Family==