How was Paul Henri d’Estournelles de Constant awarded the NobelPrize Peace?

Name: Paul Henri d’Estournelles de Constant.
Country: France.
Date of Birth: 22 November 1852.
Died: 15 May 1924.
Founder: Committee for the Defense of National Interests and International Conciliation.
Known as: Member, French Parliament.
Noble Prize Year: Nobel Prize for Peace in 1909, for their prominent position in the international movement for peace and arbitration.