It is still going on, though these days forced labour is more common than chattel slavery (ownership of people). Here's a link to get you going if you are interested in finding out more. http://www.iabolish.org/slavery_today/primer/index.html
What is the difference between slavery and chattle slavery .?
I am thinking here of indentured servants some of who came here early on as my ancestors.
Then there was the Company Store that owned people in the days long gone.
Today, about a year ago a wealthy couple who ran a million dollar business were found guilty of slavery--right here in the USA. They paid the expenses of 2 Indonesian girls to come here and become house servants. Soon as the woman got to their home the employer took away their passports. They slept on the floor and their wages $ 10.00 a month cash, with food and board was sent to their relatives.
Beatings were common, both suffered severe penalty's for the smallest infraction of the rules. Finally after 2-3 years one woman managed to get away after a beating and ran for a 7-11 where the police were called.
The trial was all over the papers and the defendants got years in prison despite their political associations and high priced lawyers.
One driving through a wealthy community can see undocumented gardeners, house keepers, Nanny's, cooks etc. A well kept secret among the wealthy, they only get caught when they run for political office and the opposition does an in depth investigation on them.