What complex institution had the greatest impact on life in medieval Europe?

After the fall of Rome, no single state or government united the people who lived on the European continent. Instead, the Catholic Church became the most powerful institution of the medieval period. Kings, queens and other leaders derived much of their power from their alliances with and protection of the Church.

Explanation:

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same