The Organization of the Petroleum Exporting Countries (OPEC) was established on September 14, 1960, by Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela in response to the dominance of multinational oil companies known as the "Seven Sisters" (BP, Shell, Exxon, Mobil, Chevron, Gulf, and Texaco), which controlled oil production, pricing, and distribution to the detriment of oil-producing nations. OPEC was formed to give these countries greater control over their natural resources and to coordinate and unify petroleum policies, ensuring the stabilization of oil markets, securing steady incomes for member countries, and providing a reliable supply of oil to consumers. By setting oil production targets and adjusting production quotas to balance supply and demand, OPEC plays a crucial role in influencing global oil prices and preventing market volatility. Its market stabilization efforts are designed to ensure fair returns for producers and a stable supply for consumers. As a key player in the global oil market, OPEC's ability to adapt to internal and external challenges will determine its future role in the global energy sector. Understanding OPEC's history, functions, and impact is essential for analyzing global economic trends and energy policies.