Crime against humanity is a term used to describe really bad things that people can do to other people. These things are so bad that they are considered crimes against all humans, everywhere. They are not just crimes against one person or a group of people, but crimes against all people.
These crimes can include things like torture, murder, enslavement, rape, and forced disappearances. They are often committed during times of war or conflict, but they can also happen during other times, especially when one group is oppressing or trying to control another group.
These crimes are considered so serious that they are recognized as crimes by the whole world. The International Criminal Court was set up to investigate and prosecute these types of crimes.
The people who commit these crimes are often punished severely by the law, as they should be. It is important to remember that all people deserve to be treated with respect and dignity, and that these crimes go against everything that is good and right in the world.