Members of the Organization of Petroleum Exporting Countries (OPEC) have recently made the decision with other oil producers (OPEC+) to slash production by 2 million barrels a day. The move—seen as led by Saudi Arabia and Russia—immediately sent oil prices higher, defies entreaties by the Biden administration for production increases to ease inflation and stabilize the global economy, and could provide a vital cash lifeline to Vladimir Putin’s war efforts in Ukraine.