The information about the anthropologists focusing primarily on bands, tribes, and chiefdoms illustrates the work of Elman Service.
It should be noted that Elman Service classified the political system into four types which are bands, tribes, chiefdoms, and states.
The framework was vital to shaping a generation of anthropological thinking about the political systems.
According to Elman Service, he proposed that political systems are developed naturally through an evolution program from simple to complex pattern.
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