Tutsis were the ethnic minority, making up about 14% as Hutus were 85% of the population, with the Twa as the remaining 1%. During Belgian colonization of Rwanda, Belgians implemented the idea that the Tutsis were more “European-looking” than the Hutus, creating favoritism between the groups. The Tutsis were then considered to be a higher class compared to the Hutus. The Tutsi were assumed to be lighter skinned and tall while the Hutu were assumed to be darker skinned and short. The Belgians measured, compared and noted the differences in skulls, noses and height to distinguish between the two groups. They also used identity cards to distinguish between who was in each group. The Belgians established a monarchy and put Tutsis in positions of power, leading to tensions between the Tutsi and Hutu, which would later prompt revolts from the Hutu. Belgium used passive colonization, not directly taking over themselves, but creating division among the groups and placing certain people in power. They introduced the idea of racism between the Hutu and Tutsi, creating ethnic tensions among them.