Adam Smith is widely regarded as the father of classical economics due to his influential work, "The Wealth of Nations", published in 1776.

Classical economists believed that labor is the primary determinant of economic growth, as it is the source of all value.

Keynesian economics emphasizes the role of government intervention in the economy to stimulate aggregate demand and promote economic growth.

Keynesian economists believe that increasing government spending can help stimulate aggregate demand and boost the economy during a recession.

Karl Marx is widely regarded as the father of Marxism, a socio-economic and political theory that analyzes the dynamics of capitalism and advocates for a socialist society.

Marxism argues that class conflict arises from the inherent contradiction between the bourgeoisie (owners of the means of production) and the proletariat (workers who sell their labor).

Marxism aims to establish a communist society, where the means of production are collectively owned and there is no class division.

Laissez-faire economics advocates for minimal government intervention in the economy, allowing market forces to operate freely.

Institutional economics emphasizes the role of institutions, such as laws, customs, and social norms, in shaping economic behavior and outcomes.

Social economics focuses on the social and ethical aspects of economic activity, aiming to promote social justice and equality.

Behavioral economics incorporates insights from psychology to understand how emotions, cognitive biases, and social influences affect economic decision-making.

Development economics focuses on the economic issues and challenges faced by developing countries, aiming to promote economic growth and reduce poverty.

Environmental economics examines the interactions between economic activity and the natural environment, addressing issues such as pollution, resource depletion, and climate change.

New growth theory focuses on the role of technological innovation, knowledge creation, and human capital in driving economic growth.

Game theory analyzes strategic decision-making in situations where multiple agents interact and the outcome depends on the choices of all participants.