This WSJ editorial says U.S. president Obama's message in Kenya and in Ghana before this trip, that Africans are responsible for their own future and how they treat their fellow citizens, is the right message. Coming from personal experience of his family the message should persuade people in Africa, particularly politicians and business people, of the need to put the common good before their own. And the need to improve the economic condition and living standards of the people on this vast continent that is nowhere near its potential.