Slavery

right|thumb|242x242px|Peter (enslaved man)|Peter, a slave from Louisiana, in 1863. The scars are the result of a whipping by his overseer.

thumb|Letter where one can read that the slave Geraldo will be free with the condition of working for another 6 years (Brazil). Arquivo Público do Estado de São Paulo|Arquivo Público do Estado de São Paulo|APESP Manumission, or enfranchisement, is the act of freeing slaves by their owners. Different approaches to manumission were developed, each specific to the time and place of a particular society. Historian Verene Shepherd states that the most widely used term is gratuitous manumission, "the conferment of freedom on the enslaved by enslavers before the end of the slave system".

killing prisoners by means of forced labour

unpaid labor, labor that does not receive any direct remuneration

political position that taxation amounts to slavery

Aristotle's belief that some people are slaves by nature

personal name given by others to an enslaved person, or a name inherited from enslaved ancestors

ideology that perceives slavery as a positive good

Abeed or abīd (, plural of ʿabd, ) is an Arabic word meaning "servant" or "slave". The term is usually used in the Arab world and is used as a slur for black people and it dates back to the Arab slave trade. In recent decades, usage of the word has become controversial due to its racist connotations and origins, particularly among the Arab diaspora.