While radicals deny it, liberals argue that developing states do have some leverage in economic statecraft in special circumstances. If a state or group of states controls a key resource of which there is limited production, their power is strengthened. Among the primary commodities, only petroleum has this potential, and it gave the Arab members of the Organization of Petroleum Exporting Countries (OPEC) the ability to impose oil sanctions on the United States and the Netherlands when those two countries strongly supported Israel in the 1973 Arab-Israeli War.