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Like the “invisible hand” of the market to which Adam Smith refers in analyzing the workings of capitalism, two forces govern the workings of politics: power—the ability to induce behavior of others in specified ways by means of coercion or use or threat of physical force—and authority—the ability to induce behavior of others by persuasion.1 Extreme examples of the exercise of power are the gulags (prison camps) in Stalinist Russia, the death camps in 
Nazi-ruled Germany and Eastern Europe, and so-called Supermax prisons such as Pelican Bay in California and the prison for “enemy combatants” in Guantanamo Bay, Cuba, by the United States. In all of these settings, prisoners comply or are punished or executed. At the other extreme are most forager societies, which typically exercise authority more often than power. Groups in those societies comply with the wishes of their most persuasive members.

In actuality, power and authority are points on a continuum and both are present in every society to some degree. Even Hitler, who exercised absolute power in many ways, had to hold the Nuremberg rallies to generate popular support for his regime and persuade the German population that his leadership was the way to national salvation. In the Soviet Union, leaders had a great deal of coercive and physical power but still felt the need to hold parades and mass rallies on May Day every year to persuade people to remain attached to their vision of a communal society. At the other end of the political spectrum, societies that tend to use persuasion through authority also have some forms of coercive power. Among the Inuit, for example, individuals who flagrantly violated group norms could be punished, including by homicide.2

A related concept in both politics and law is legitimacy: the perception that an individual has a valid right to leadership. Legitimacy is particularly applicable to complex societies that require centralized decision-making. Historically, the right to rule has been based on various principles. In agricultural states such as ancient Mesopotamia, the Aztec, and the Inca, justification for the rule of particular individuals was based on hereditary succession and typically granted to the eldest son of the ruler. Even this principle could be uncertain at times, as was the case when the Inca emperor Atahualpa had just defeated his rival and brother Huascar when the Spaniards arrived in Peru in 1533.3

In many cases, supernatural beliefs were invoked to establish legitimacy and justify rule by an elite. Incan emperors derived their right to rule from the Sun God and Aztec rulers from Huitzilopochtli (Hummingbird-to-the-Left). European monarchs invoked a divine right to rule that was reinforced by the Church of England in Britain and by the Roman Catholic Church in other countries prior to the Reformation. In India, the dominance of the Brahmin elite over the other castes is justified by karma, cumulative forces created by good and evil deeds in past lives. Secular equivalents also serve to justify rule by elites; examples include the promise of a worker’s paradise in the former Soviet Union and racial purity of Aryans in Nazi Germany. In the United States and other democratic forms of government, legitimacy rests on the consent of the governed in periodic elections (though in the United States, the incoming president is sworn in using a Christian Bible despite alleged separation of church and state).

In some societies, dominance by an individual or group is viewed as unacceptable. Christopher Boehm (1999) developed the concept of reverse dominance to describe societies in which people rejected attempts by any individual to exercise power.4 They achieved this aim using ridicule, criticism, disobedience, and strong disapproval and could banish extreme offenders. Richard Lee encountered this phenomenon when he presented the !Kung with whom he had worked over the preceding year with a fattened ox.5 Rather than praising or thanking him, his hosts ridiculed the beast as scrawny, ill fed, and probably sick. This behavior is consistent with reverse dominance.

Even in societies that emphasize equality between people, decisions still have to be made. Sometimes particularly persuasive figures such as headmen make them, but persuasive figures who lack formal power are not free to make decisions without coming to a consensus with their fellows. To reach such consensus, there must be general agreement. Essentially, then, even if in a backhanded way, legitimacy characterizes societies that lack institutionalized leadership.

Another set of concepts refers to the reinforcements or consequences for compliance with the directive and laws of a society. Positive reinforcements are the rewards for compliance; examples include medals, financial incentives, and other forms of public recognition. Negative reinforcements punish noncompliance through fines, imprisonment, and death sentences. These reinforcements can be identified in every human society, even among foragers or others who have no written system of law. Reverse dominance is one form of negative reinforcement.