Final answer:
Anthropologists consider a government without a formal head to be an acephalous society, where leadership is situational and decisions are made through discussion and consensus.
Step-by-step explanation:
Anthropologists consider a government without a formal head to be an acephalous society. In such societies, leadership is situational and temporary, and decisions are made through discussion and consensus.
Leaders in acephalous societies have persuasive power but no formal means of enforcing their will. Examples of acephalous societies include small communities where people can govern themselves without the need for a centralized government.