The Yanomami do not recognize themselves as a united group, but rather as individuals associated with their politically autonomous villages. Yanomami communities are grouped together because they have similar ages and kinship, and militaristic coalitions interweave communities together. The Yanomami have common historical ties to Carib speakers who resided near the Orinoco river and moved to the highlands of Brazil and Venezuela, the location the Yanomami currently occupy. Mature men hold most political and religious authority. A tuxawa (headman) acts as the leader of each village, but no single leader presides over the whole of those classified as Yanomami. Headmen gain political power by demonstrating skill in settling disputes both within the village and with neighboring communities. A consensus of mature males is usually required for action that involves the community, but individuals are not required to take part. Local descent groups also play important roles in regulating marriages and settling disputes within villages.