 Anthropologist Jean Hiernaux contends that the Tutsi are a separate race, with a tendency towards "long and narrow heads, faces and noses"; others, such as Villia Jefremovas, believe there is no discernible physical difference and the categories were not historically rigid.In precolonial Rwanda the Tutsi were the ruling class, from whom the kings and the majority of chiefs were derived, while the Hutu were agriculturalists.The current government discourages the Hutu/Tutsi/Twa distinction, and has removed such classification from identity cards.