Son of Alberic and Marozia, ruler of Rome.
Selected pope due to the political machinations of his mother who influenced his every decision until her overthrow.
At that point he came under the influence his brother in all non-spiritual matters who made all decisions about civil and ecclestiastical matters.
The only real accomplishment his papacy was his support of the Congregation of Cluny which, in the long run, benefited the Church immensely.