How did Pope Gregory reform the Catholic church?

Canonical elections were introduced under Pope Gregory VII's rule and were effective in making sure bishops and priests did not appoint their successors and the practice of lay investiture was removed. The reform of the Church was Gregory VII's life work, driven by his conviction that the Church was founded by God.

false, the two are unrelated

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.