There are many countries at risk of genocide.
The genocide took place between April and June of 1994 and during this time period around 800,000 Tutsis died (During 100 days). The Rwandan genocide happened because the Belgian government took control of Rwanda and put in a class system. This put the Hutus under the Tutsis and their rank depended on how big your nose/eye was and many cattle you have. This was all based on the Belgians perspective because they favored the Tutsis more than the Hutus. The class system was established because it made taking control of Rwanda much easier. Then the Belgians gave the Tutsis special privileges and gave everyone ID cards so they could tell everyone apart. Then the Hutus got fed up with the horrid treatment and retaliated against the Tutsis with their larger numbers.