Slavery

Slavery is a system under which people are treated as property to be bought and sold, and are forced to work. Slaves can be held against their will from the time of their capture, purchase or birth, and deprived of the right to leave, to refuse to work, or to demand compensation. Historically, slavery was institutionally recognized by most societies; in more recent times, slavery has been outlawed in all countries, but it continues through the practices of debt bondage, indentured servitude, serfdom, domestic servants kept in captivity, certain adoptions in which children are forced to work as slaves, child soldiers, and forced marriage. Slavery is officially illegal in all countries, but there are still an estimated 20 million to 30 million slaves worldwide. Mauritania was the last jurisdiction to officially outlaw slavery, but about 10% to 20% of its population is estimated to live in slavery.
Slavery predates written records and has existed in many cultures. Human trafficking is primarily used for forcing women and children into sex industries.
Terminology
The English word slave comes from Old French sclave, from the Medieval Latin sclavus, from the Byzantine Greek σκλάβος, which, in turn, comes from the ethnonym Slav, because in some early mediaeval wars many Slavs were captured and enslaved. An older theory connected it to the Greek verb skyleúo 'to strip a slain enemy'.
The word used to call a slave has also been utilized to express general dependency to someone else. In many cases, such as in ancient Persia, the situation and lives of such slaves could be better than those of other common citizens.
Types
Chattel slavery
Chattel slavery, also called traditional slavery, is so named because people are treated as the chattel of an owner and are bought and sold as if they were commodities. It is the original form of slavery and the least prevalent form of slavery today.
Bonded labor
Debt bondage or bonded labor occurs when a person