Between 1950 and 1954 Belgium had a homogeneous catholic majority in Parliament. Theoretically this brings about a stable government, but in real term it caused a lot of trouble. The Christian People's Party changed its prime minister three times. Different reasons explain this attempt to further the particracy from a party one had not expected this. First, the outcome ofthe Royal Question creates a tension between the party and the government. The party can not fulfill its election promises. Second, the homogeneous majority is based on a heterogeneous party, where progressives and conservatives, Flemish and Walloon politicians determine the decision-making. Moreover, the party as such claims its position in the decision-making process. The parliamentary groups and the government are considered as executors ofa partyprogram and must thereforebe subordinated to the party. The process where parties expanded to the dominant actor in the political system, becomes clear.