For 10 points, name this president of Tanzania.
Idi Amin once got so mad at this man that he challenged him to a boxing match, with Muhammad Ali as the referee.  He translated Julius Caesar and The Merchant of Venice into Swahili, but he is better known for tracts like Freedom and Unity, which defended the socialist doctrine of Ujamaa, and for leading his country after it was formed from the union of Zanzibar and Tanganyika.  For 10 points, name this president of Tanzania.
Idi Amin once got so mad at this man that he challenged him to a boxing match, with Muhammad Ali as the referee.  
Julius (Kambarage) Nyerere