Arthur Ponsonby, 1st Baron Ponsonby of Shulbrede

Biography

Arthur Augustus William Harry Ponsonby, 1st Baron Ponsonby of Shulbrede (16 February 1871 – 23 March 1946), was a British politician, writer, and social activist involved with both the Liberal and Labour parties. Born at Windsor Castle, he was the son of Sir Henry Ponsonby, Private Secretary to Queen Victoria, and Mary Elizabeth Bulteel, daughter of John Crocker Bulteel. His family connections included the 3rd Earl of Bessborough, the 3rd Earl of Bathurst, and the 2nd Earl Grey, and his elder brother became the 1st Baron Sysonby. He attended Eton College and Balliol College, Oxford, where he developed his intellectual background before entering politics.

Ponsonby started his political journey as a Liberal, initially serving as a page to Queen Victoria before moving on to elected office. He was elected to Parliament and later switched to the Labour Party, in line with his growing radical social beliefs. He held various important roles, such as Parliamentary Private Secretary to the Prime Minister and later as Parliamentary Under-Secretary of State for Foreign Affairs under Ramsay MacDonald. He became 1st Baron Ponsonby of Shulbrede in 1930, named after the medieval priory in West Sussex that was his family home.

Outside of politics, Ponsonby was a dedicated pacifist, especially active during and after the First World War. He is often associated with the phrase 'When war is declared, truth is the first casualty,' which he included as an epigram in his 1928 book Falsehood in War-time. Although he didn't claim the phrase as his own—it likely originated from a 1917 remark by U.S. Senator Hiram Johnson—the saying became linked to Ponsonby and his critique of wartime propaganda.

In the 1930s, Ponsonby led the Peace Pledge Union and organized a widely discussed peace letter, known as the Ponsonby Peace Letter or Peace Letter, in which hundreds of thousands of British citizens pledged to refuse participation in war. Although this effort was overshadowed by the events leading to the Second World War, it drew significant attention to the pacifist movement. He resigned the leadership of the Labour peers in the House of Lords in 1935, protesting the party's support of sanctions against Italy after the invasion of Abyssinia, highlighting the conflict between collective security and pacifism.

Apart from his political writing, Ponsonby was an esteemed biographer, winning the James Tait Black Memorial Prize in 1943 for his contributions to biography. He was married to Dorothea Ponsonby. He passed away on 23 March 1946 at Hindhead, Surrey, leaving a significant legacy of political involvement, literary work, and moral advocacy.