In the mid-18th century, the Tutsi royalty consolidated authority over land, production, and distribution with the development of the ubugabire—a patron-client relationship in which the populace received royal protection in exchange for tribute and land tenure. By this time, the royal court was made up of the Tutsi-Banyaruguru. They had higher social status than other pastoralists such as the Tutsi-Hima. In the lower levels of this society were generally Hutu people, and at the very bottom of the pyramid were the Twa. The system had some fluidity, however. Some Hutu people belonged to the nobility and in this way also had a say in the functioning of the state.