Elite Theory posits that a small group of individuals from the economic elite control political power and decision-making in oligarchic systems.

Michels' theory suggests that in large organizations, power tends to concentrate in the hands of a small group of leaders, regardless of the initial intentions of the organization.

Institutional Theory examines how formal and informal institutions, such as laws, norms, and organizational structures, contribute to the formation and maintenance of oligarchic systems.

Pareto's theory suggests that oligarchic systems experience a cyclical pattern where new elites periodically replace existing elites, maintaining the overall structure of oligarchic rule.

Pluralist Theory posits that oligarchic systems are characterized by a multitude of interest groups competing for influence, resulting in a balance of power and preventing the dominance of any single group.

Burnham's theory suggests that in modern societies, power has shifted from traditional elites to professional managers who control large corporations, leading to the formation of managerial oligarchies.

Ideological Theory explores how ideologies and cultural beliefs legitimize and perpetuate oligarchic power structures, shaping the perceptions and behaviors of individuals within the system.

Mosca's theory suggests that in oligarchic systems, a small group of individuals who hold political office constitute the ruling class and maintain their power through various mechanisms, such as patronage, coercion, and control of information.

Network Theory examines how social networks and interpersonal connections among elites facilitate the exercise of power and influence in oligarchic systems.

Mills' theory suggests that in oligarchic systems, a small group of elites who control the means of production, the political realm, and the military constitute the power elite and exercise significant influence over society.

Historical Institutionalism explores how historical events, cultural norms, and institutional legacies shape the formation and persistence of oligarchic systems.

Olson's theory suggests that in large groups, individuals may be reluctant to participate in collective action due to the costs involved and the uncertainty of benefits, making it challenging to challenge oligarchic power.

Party Theory examines how political parties, their organizational structures, and internal power dynamics contribute to the formation and maintenance of oligarchic systems.

Moore's theory suggests that the path to modernization, whether through agrarian revolution, industrial revolution, or technological revolution, can influence the emergence of oligarchic systems.

World-Systems Theory explores how global power dynamics, economic inequalities, and international institutions contribute to the formation and maintenance of oligarchic systems.