Borders of nations can be changed by mutual agreement. Unfortunately the national leaders of African nations have been willing to keep these arbitrary borders,

Borders of nations can be changed by mutual agreement. Unfortunately the national leaders of African nations have been willing to keep these arbitrary borders, and much of the time only the other way is applied, i.e. war. War is also how the European national borders have been decided. In the U.S., the state borders are remarkably similar to African borders: straight lines along a particular meridian or circle of latitude. So is the Canadian border.