This, from wiki-
Prior to the Civil War, Cooper was active in the anti-slavery movement and promoted the application of Christian concepts to solve social injustice. He was a strong supporter of the Union cause during the war and an advocate of the government issue of paper money.
Influenced by the writings of Lydia Maria Child, Cooper became involved in the Indian reform movement, organizing the privately funded United States Indian Commission. This organization, whose members included William E. Dodge and Henry Ward Beecher, was dedicated to the protection and elevation of Native Americans in the United States and the elimination of warfare in the western territories.
Cooper's efforts led to the formation of the Board of Indian Commissioners, which oversaw Ulysses S. Grant's Peace Policy. Between 1870 and 1875, Cooper sponsored Indian delegations to Washington, D.C., New York City, and other Eastern cities. These delegations met with Indian rights advocates and addressed the public on United States Indian policy. Speakers included: Red Cloud, Little Raven, and Alfred B. Meacham and a delegation of Modoc and Klamath Indians.
Good enough for me!