According to historian Avery O. Craven in 1950, the Confederate States of America nation, as a state power, was created by secessionists in Southern slave states, who believed that the federal government was making them second-class citizens and refused to honor their belief – that slavery was beneficial to the Negro. They judged the agents of change to be abolitionists and anti-slavery elements in the Republican Party, whom they believed used repeated insult and injury to subject them to intolerable "humiliation and degradation". The "Black Republicans" (as the Southerners called them) and their allies soon dominated the U.S. House, Senate, and Presidency. On the U.S. Supreme Court, Chief Justice Roger B. Taney (a presumed supporter of slavery) was 83 years old and ailing.