What group decided how much oil should be sold and produced?

The Organization of the Petroleum Exporting Countries (OPEC) is the group that primarily decides how much oil should be sold and produced among its member countries. Established in 1960, OPEC aims to coordinate and unify petroleum policies to secure fair and stable prices for petroleum producers, ensure a regular supply for consumers, and provide a fair return on capital for those investing in the petroleum industry. OPEC's decisions on production levels significantly influence global oil prices.