summary: The wars start with rebellions and grievences but quickly deteriorate into gangs who rape steal and kill just because they can.
and no one stops them.
Even Robert Mugabe, Zimbabwe's dictator, was once a guerrilla with a plan. After transforming minority white-run Rhodesia into majority black-run Zimbabwe, he turned his country into one of the fastest-growing and most diversified economies south of the Sahara -- for the first decade and a half of his rule. His status as a true war hero, and the aid he lent other African liberation movements in the 1980s, account for many African leaders' reluctance to criticize him today, even as he has led Zimbabwe down a path straight to hell.
These men are living relics of a past that has been essentially obliterated. Put the well-educated Garang and the old Mugabe in a room with today's visionless rebel leaders, and they would have just about nothing in common. What changed in one generation was in part the world itself. The Cold War's end bred state collapse and chaos. Where meddling great powers once found dominoes that needed to be kept from falling, they suddenly saw no national interest at all. (The exceptions, of course, were natural resources, which could be bought just as easily -- and often at a nice discount -- from various armed groups.) Suddenly, all you needed to be powerful was a gun, and as it turned out, there were plenty to go around. AK-47s and cheap ammunition bled out of the collapsed Eastern Bloc and into the farthest corners of Africa. It was the perfect opportunity for the charismatic and morally challenged....