A critical factor of chiefdoms is:Reciprocal obligationVillage leaders were expected to do what primary thing to their followers?rewardIn communities where "Big Men" ruled, what was the nature of leadership?transitoryPacific navigators passed knowledge from generation to generation by what method?word of mouthPrerequisites for long ocean journeys included what kind of resources?Root vegetables, small transportable animals, and seaworthy sailing crafThe institutionalization or warfare in Maori New Zealand is thought to relate to the introduction of _________________ afer 1400 A.D. which generated agricultural surpluses overpopulation, and warlike competition.sweet potatoesChaco canyon was an important ceremonial center for the _________________ people: