If you think that salvery doesn't exist then you are wrong. Slavery still exists today, in every country of the world although the modern name for practices akin to slavery is human trafficking. Millions of people are forced to work in slavelike conditions around the world today.
Slaves are used for labor and prostitution. millions of them are children, and the children are forced to work as laborers or prostitutes as well. there is also child sex tourism, where rich men travel to third world countries to have sex with minors.