"Invisible hand" refers to the idea that each individual pursuing unencumbered their own best interest results in the best for society in general, as if there were an invisible intelligent force acting in society's interests. [1]
In a free economy, a monopoly can be contrary to this idea, as it can result in a suboptimal state for society, as if there were no overall-optimizing invisible hand.
In a free economy, a monopoly can be contrary to this idea, as it can result in a suboptimal state for society, as if there were no overall-optimizing invisible hand.
[1] https://en.wikipedia.org/wiki/Invisible_hand