Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.
Despite the increase in world attention toward Sudan in the past months, the genocide in Darfur has continued without any serious attempt by the Sudanese government to do what governments primarily exist to do, protect their citizens.
He killed his enemies because he was afraid they would kill him. Amin ordered entire tribes to be put to death, because he feared they would rebel.