Then, in 1933–34, the Belgians conducted a census in order to issue “ethnic” identity cards, which labeled every Rwandan as either Hutu (eighty-five percent) or Tutsi (fourteen percent) or Twa (one percent). The identity cards made it virtually impossible for Hutus to become Tutsis, and permitted the Belgians to perfect the administration of an apartheid system rooted in the myth of Tutsi superiority.
