According to Stanford Encyclopedia of Philosophy, nationalism is the attitude that the members of a nation have when they care about their national identity, and the actions that the members of a nation take when seeking to achieve (or sustain) self-determination.
Such kind of attitude that guides one's actions towards a nation is the enemy that has for years eaten us, Africans, from within. Did you that Africa is richest continent in the world in natural resources ranging from arable land, water, oil, natural gas, minerals, forests and wildlife? The irony is, Africa is the poorest despite all these natural riches.