He stood as a Liberal candidate in
Hertford in 1906 and
Ashburton in 1908. Eventually he was elected as a
Member of Parliament in Ashburton in 1910 but lost his seat in the second election of that year. In 1914 he, along with his brother Noel, made his way to
Bulgaria. They had stopped in
Bucharest,
Romania in October 1914. While there, an assassination attempt was made on them, by
Turkish activist,
Hasan Tahsin. He was shot through the lung, but survived. His brother also was wounded in the jaw. Tashsin was captured and sent to prison for five years. from the boulevard named after the brothers Noel & Charles Buxton in
Sofia,
Bulgaria () During the
First World War, he was one of the minority arguing for a negotiated peace and was a founder member of the
Union of Democratic Control. In 1917, he left the Liberal Party and joined the
Independent Labour Party (ILP). As secretary to the Labour Party's delegation to the
Soviet Union in 1920, he was very impressed by what he saw, and wrote a book about it,
In A Russian Village (1922). 1918 he contested
Accrington for the Labour Party and lost, won the seat in 1922, and lost again in 1923. He won the seat of
Elland in 1929, but was defeated in 1931 and 1935. Buxton was always much more effective behind the scenes, acting as policy advisor on foreign and colonial issues to the Labour Party. He showed particular interest in the rights of indigenous people of Africa, and travelled widely in the continent. Another of his interests was
Esperanto, becoming president of the international society of Quaker Esperantists. With Dorothy, he became a member of the
Society of Friends. They were eager campaigners for peace, and were critical of what they perceived as the unfairness to Germany of the
treaty of Versailles. Shortly before the outbreak of World War II they still argued that peace could be attained by responding to German grievances. The outbreak of war was a great disappointment to them both. ==Last years and death==