||This thesis gives an overview of the Maasai livestock economy as it has developed between 1890 and 1990. Particularly, it analyses the processes and policies of land use and landownership of the Maasai pastoral areas in Kajiado district, Kenya, from the arrival of the Europeans until the recent massive individualization of land tenure. The loss of grazing pastures due to increased cultivation, the establishment of game parks and mineral exploitation is said to undermine the livestock economy of Maasai pastoralists in Kajiado district. Furthermore, the recent subdivision of group ranches into too small individual holdings, it is feared, will result in the selling of land to outsiders. This study examines the outcome of this process as well as the Maasai response of economic intensification and diversification, including increasing the productivity of the herd, cultivation, wage employment, outmigration, etc. Fieldwork for the study was carried out in 1988-1989.