Actually you can learn a lot from the Rawanda massacre. One is that even if no one has guns you can still have genocide! SO much for more guns = more crime.
Second the thing to read is Jared diamonds book 'Collapse' in which he puts the real reasons into perspective. Although "ethnic strife" was the excuse, the real reason for the massacre was much more primordial than even that! Just prior to the event it was noticed that the land in Central Africa had essentially reached "peak capacity". There was literally no land left for anyone. And what land families did have had to be divided up into smaller and smaller parcels with each generation. Thereby increasing poverty, crowding, anger and suspicion. This is'nt even talked about it the movie. Also bad land management led to less productitivity per acre hence the need for even more land per person. In nature when this happens to animals like mice or deer or whatever, they all starve until there are fewer survivors and the cycles gets into balance again. For humans it is genocide
. Although this may sound Evil, nature knows no morals. And here is the outcome of genocidal strife- 1. Less people alive therefore more "resources" for the survivors like land and food and water. 2. restructuring of the social order, some old corruptions get swept away and the poor get a little richer as they plunder and debts and records are erased. (remeber fight club?
) 3. With the destruction of infrastructure then there is a need to rebuild, hence jobs for everyone. (remeber WWII?) 4. Social progress, hopefully the people will remeber what got them into the trouble in the first place, like having too many children, and learn to aviod such things in the future thereby making the future a little better. But then again, humans are pretty dumb.