Answer: To increase oil prices by controlling global supply
Step-by-step explanation:
The Organization of Petroleum Exporting Countries (OPEC) was formed when some oil producing countries decided that it would be best to form a cartel that would dictate the supply of oil and in effect the price as well.
By forming a cartel, they would have more control over what price to charge other nations which would allow for more revenue to come into these countries. OPEC also uses its influence to impart global issues as they once refused to sell oil to western nations unless those nations criticized and restricted support for Israel.