The U.S. Department of Justice (DOJ) has filed a complaint against Apple, accusing the tech giant of maintaining an illegal monopoly over smartphones. The DOJ's legal argument states that Apple's practices restrict competition and harm consumer welfare, a view that contrasts with those who see competition as a dynamic process beneficial over time. Apple is expected to defend its practices vigorously. The case could potentially broaden antitrust enforcement in economic regulation, signaling a significant shift in how such cases are approached.