Origins of Hutu, Tutsi and Twa on economic criteria. Formal and discrete social divisions were consequently imposed upon ambiguous biological distinctions. To some extent, the permeability of these categories in the intervening decades helped to reify the biological distinctions, generating a taller elite and a shorter underclass, but with little relation to the gene pools that had existed a few centuries ago. The social categories are thus real, but there is little if any detectable genetic differentiation between Hutu and Tutsi. Tishkoff et al. (2009) found their mixed Hutu and Tutsi samples from Rwanda to be predominately of Bantu origin, with minor gene flow from Afro-Asiatic
Hutu Power Front (RPF) invasion, Habyarimana turned to inflaming ethnic tensions. Hutu Power acquired a variety of spokesmen. Hassan Ngeze, an entrepreneur recruited by the government to combat the Tutsi publication "Kanguka", created and edited "Kangura", a radical Hutu Power newsletter. He published the "Hutu Ten Commandments", which included the following: "Radio Télévision Libre des Mille Collines" broadcast radio shows suggesting the end to toleration of the Tutsi, repeating the Hutu Ten Commandments, and building support for the Hutu Power ideology. Two main voices of RTLM were announcers Valérie Bemeriki and Georges Ruggiu. The repetition of Hutu Ten Commandments was an attempt