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Nearly 30 years ago, Rwanda's Hutu population initiated perhaps the most successful genocide campaign in recent history, systematically murdering more than 800,000 members of the Tutsi population over a three-month period.

The period before the genocide began was marked by heightened political tensions. Hutus and their supporters would take to radio broadcasts to brand Tutsis "cockroaches," which normalized animosity toward them. It was successful propaganda that altered the lives of millions.

This isn't the first time that people have used propaganda for nefarious reasons – far from it. People shared their thoughts with us after Redditor fitboy15 asked the online community,

"What piece of propaganda did the most damage?"