What are the potential dangers of cloning?

In fact, the main driving force of biological evolution is genetic variation, which produces new species and naturally eliminates species that are not suitable for the environment, so organisms will evolve in the direction of adapting to nature. If the cloning technology achieves the goal of completely cloning the human body and the genes have not changed, then people will lose the motivation of evolution. Technically speaking, a small number of human clones are harmless to society, but as my friend upstairs said, there are many other reasons why human cloning is prohibited now.