Most OPEC countries are located in the Middle East, including Saudi Arabia, Iran, Iraq, Kuwait, and the United Arab Emirates. OPEC's power comes from their ability to control a significant portion of the world's oil production and exports, which gives them influence over global oil prices and the economies of countries that rely on oil imports.

Traditional economies are based on customs, traditions, and beliefs, with economic activity centered around subsistence farming and hunting/gathering. Command economies are characterized by central government planning and control of economic activity, with resources and production decisions made by the state. Market economies are based on the principles of supply and demand, with private individuals and firms making economic decisions and prices determined by the market.

Subsistence agriculture is farming for personal consumption, with little surplus produced for sale. Commercial agriculture is farming for profit, with crops and livestock grown for sale in local or global markets.

Cottage industries are small-scale manufacturing businesses that are often home-based and rely on traditional techniques and tools.

NATO's purpose is to provide collective defense and security for its member countries, while the Truman Doctrine provided economic and military support to countries threatened by Soviet expansion and communism.

NAFTA is a trade agreement between the US, Canada, and Mexico aimed at promoting economic growth and reducing trade barriers between the three countries.

The primary sector involves the extraction and production of raw materials, the secondary sector involves manufacturing and processing those materials into finished goods, the tertiary sector involves providing services to consumers, and the quaternary sector involves knowledge-based activities such as research and development.

Economic development levels are typically categorized using the Demographic Transition Model (DTM), with characteristics such as high birth and death rates in early stages and low birth and death rates in later stages. Economic activities vary at each level, with primary activities dominant in early stages and secondary and tertiary activities becoming more prevalent in later stages.

Railroads have historically had a significant impact on economic activities, allowing for faster transportation of goods and increased trade and commerce.

Offshore US drilling can impact the economy by reducing reliance on foreign oil imports and creating jobs in the energy sector.

Overfishing can have severe ecological and economic impacts, such as reducing fish populations and disrupting marine ecosystems, which can have ripple effects on industries that rely on fishing.

Wind farms and other renewable energy sources can provide a sustainable and environmentally friendly alternative to fossil fuels, while also creating jobs in the renewable energy sector.

Economic agreements can impact trade by reducing or eliminating trade barriers such as tariffs, quotas, and other