Historically, power in Afghanistan has been decentralized and governance delegated locally to ethnic tribal leadership. Tribal leaders often act as local warlords, representing either a tribal confederacy, a tribal kinship group or a smaller tribal lineage grouping, and are expected to provide security, justice and social services to their respective "constituencies". There are four dominant ethnic tribes in Afghanistan (Pashtuns, Tajiks, Hazaras, and Uzbeks), as well as a number of proportionally smaller tribes. The Pashtuns are the largest and most dominant ethnic tribe in the country, whose name translates to "Land of the Pashtuns".