What are the major arguments against monopoly?

Major arguments against monopolies include reduced competition, which can lead to higher prices and lower quality products for consumers. Monopolies can stifle innovation, as the lack of competitive pressure diminishes the incentive to improve or develop new technologies. Additionally, monopolies can exert undue influence over markets and policymakers, potentially leading to regulatory capture and unfavorable conditions for smaller businesses. Overall, monopolies can create significant economic inefficiencies and harm consumer welfare.