Plateau villages in the late nineteenth century were small clusters of round pole-and-mud huts with associated granaries and cattle pens, frequently housing a single extended family or a small number of kinsmen with their dependents, including slaves. Shifting cultivation encouraged the relocation of villages; these occasions provided the opportunity for dissidents to hive off. In the west, the placement of homesteads along long ridges to avoid floods led to larger aggregates. On the Zambezi plain, where alluvial soils permitted long-term cultivation, villages were stable and could contain up to 400 or 500 people. Early colonial administrators amalgamated small villages and required each village to have a minimum of 10 able-bodied male taxpayers, who had to build near their appointed headman. When these rules were relaxed in the 1950s, plateau villages were already somewhat stabilized by the placement of schools, by the planting of fruit trees, and by the construction of more permanent housing; nevertheless, villages rarely contained more than 300 people. Gwembe villages began to fragment after their relocation to the hills in 1958. Many Tonga now live in cities or in the small towns of the province, which are commercial and service centers for rural people.