Slavery Slavery is the act of one sentient being controlling another in violation of the other ' s will . The one so controlled is referred to as a slave . Slaves are often considered the property of the controller . The Slaver Empire controlled a large galactic empire 1 billion years ago . The Slaver s were known as the masters of all intelligent beings in most of the galaxy until one species revolted . ( ) Slavery was common in ancient Earth , being practiced as late as the middle of the 19th century in the southern United States before being outlawed as a consequence of the American Civil War . These events had a great impact on Human history , and were widely remembered to the point that , almost three hundred years later , when Charles Tucker III wondered aloud what kind of people the Orion slave traders the had encountered were , Arik Soong caustically responded that , given the Florida native ' s southern accent , he likely had ancestors quite similar to them . ( ) Around this time , a Skagaran ship was sent to Earth . The vessel ' s crew abducted several thousand Human s that were taken to help the Skagarans start a colony , and serve as slave workers . ( ) In 1937 , the Briori kidnapped three hundred Humans from Earth and took them back to an unnamed Class L planet in the Delta Quadrant and used them as slaves . The slaves managed to revolt and overthrow the Briori . ( ) Though the Ferengi claimed that their society had never engaged in slavery , women in their culture were still considered property and had no rights . ( , ) The Romulan Star Empire used the Reman s as a slave class from at least as early as the 22nd century until at least as late as 2379 . ( , ) In 2153 , a humanoid named Zjod traded in sex slaves of various species from a shop in a floating bazaar on the Xanthan homeworld . ( ) When the Antican delegate s requested their livestock be given to them alive so they could butcher it themselves later , Riker explained that Humans no longer enslaved animals for food purposes . ( ) Slavery was also in operation in the mirror universe . By the mid 22nd century , the Vulcan s , Andorians , Tellarites , and Orions had been enslaved by the Terran Empire . The Tholian s employed slave workers to gut the when it went through an interspacial rift and arrived in the mirror universe . They also employed alien slave masters , one of which was a Gorn named Slar . ( ) Following the conquest of their world by the Terran Empire , the Bajorans became slaves to s . When the Empire was subsequently conquered by the Klingon - Cardassian Alliance , the Terrans were themselves enslaved , as were the Vulcans . Once liberated , the Bajorans went on to become influential members of the Alliance . ( ) " In 2258 of the alternate reality , Admiral enslaved , so he could build weapons and warships for Starfleet , after awakening him from cryogenic stasis . Marcus did this by holding the rest of the crew of the hostage under the threat of murder and genocide . " ( ) The Orion s used slave labor as late as the 23rd century . Common belief was that Orion women were slaves to the men , when it was in fact the opposite . ( , ) In the 22nd century , Orions frequently kidnapped members of other species for slave trade . ( ) By the 23rd century , slavery had been practiced by the parallel of the Roman Empire on 892 - IV for 2 , 000 years . They were slave revolts in earlier centuries but slaves gradually received rights to medicine and government payments in their old age , becoming more content in the process . ( ) During the Occupation of Bajor from 2319 to 2369 , enforced labor was practiced at labor camp s . This is a situation similar to slavery . ( , et . al ) The Kazon were a subjugated race , used as slave labor by the Trabe who had conquered their homeworld . They remained in captivity until in 2346 , when Jal Sankur convinced the various Kazon sects to put aside their differences and rise up against the Trabe . In doing so the Kazon took the Trabe ' s ships and technology and forcing them to become a nomadic species , never allowing them to settle on a new world . ( ) When Bruce Maddox wanted to disassemble Data in 2365 in order to learn how to create more android s , Data refused , but was ordered to undergo the procedure on the grounds that he was Starfleet property . Jean - Luc Picard challenged the ruling but questioned his convictions after hearing the statement of the prosecution . Guinan helped him realize that creating an entire " race " of Datas for use as tools would , in fact , be slavery . ( ) In 2366 , two Breen warships attacked the " Ravinok " , a Cardassian prison transport carrying 32 Bajoran prisoners crewed by eighteen Cardassians . They forced that ship to crash land on the planet Dozaria . The Breen then used the survivors of this crash as laborers at a nearby dilithium mine . They remained slaves until freed by Major Kira Nerys and Legate Dukat in 2372 . ( ) In the mid - 2370s , the United Federation of Planets began using sentient holoprograms , the various types of outdated Emergency Medical Holograms , for slave labor purposes , utilizing them for difficult and dangerous tasks such as warp conduit maintenance and dilithium mining . The publication of the holonovel " Photons Be Free " by The Doctor , however , caused many in the Federation to begin changing their minds about this practice . ( )