Why are monopolies and cartels unfair to other business owners?

Monopolies and cartels create unfair market conditions by limiting competition, which can lead to higher prices and reduced choices for consumers. They often manipulate supply and demand to maximize profits, disadvantaging other businesses that cannot compete on the same level. This can stifle innovation and discourage new entrants into the market, ultimately harming the overall economy. As a result, smaller businesses may struggle to survive, leading to reduced diversity in the marketplace.