The idea, or attitude, that human beings are superior to other sentient beings.
Often justified by the misinterpretation of the Bronze Age biblical story of creation, at the end of which the creator presumably declared man the ruler of all other earthly beings.
This is in direct contradiction to, for example, the Buddhist compassion for all sentient beings, which are deemed equal to man.
Human arrogance has led to the extinction of many a species. It has also spread into the idea that some people are superior to others, and has caused such plagues as slavery, racism, nationalism, and wars.