Slavery is still around today. In the Sudan, animists and Christians in the southern part of the country are sold as slaves by northern Muslims. I am not sure if this is technically illegal or not. There are many reports of women being duped into virtual slavery as prostitutes when they thought they were immigrating to the US or Western Europe. Reports from many other Arab nations, including the more moderate nations, indicate that slavery continues there as well.
That Sudan example has caused some controversy in the UN and US. First, There is a debate going on if the buying back and freeing of these slaves (often done by Western missionaries) actually is a good thing or if it is actually encouraging the slave trade. Second, the African-American leaders have been strangely quiet on the subject even though they mention the the horrors of American slavery often. It seems rather ironic that men who condemned South African apartheid and want slavery reparations do not seem so outraged when it is Africans enslaving Africans. It somewhat undermines their theory of the evil of white people when their race does the same thing. IIRC A muslim leader by the name Farakhan actually visited the Sudan and was very friendly with them. He also believes he has been on the 'mothership' (whatever that means) orbiting Earth so maybe he is not a good example. ;-)
For all you Europeans, you must understand that slavery is a very touchy subject in the USA. Unlike your countries, our former slaves are now a sizeable part of the population (actually, we have many of your slaves as well). Even after slavery was abolished, racism and segregation remained to oppress these people for a good hundred years and remains to a lesser extent today. African-Americans are still economically disadvantaged compared to whites, though there is more than one reason for that. Slavery also resulted in the bloodiest war in US history: the American Civil War. We also have a nasty case of political correctness that is starting to get out of control which makes many people prefer PC lies to the truth. APKicks reflects that problem. APK, with all due respect, slavery is a terrible thing but pretending it didn't exist is just as terrible.
I am no supporter of slavery but, at one time, it was a better option than some of the alternatives. If the choice is razing the city and putting the population to the sword or enslaving them instead, slavery is the much more humane option. Servitude beats slavery. Of course, peace beats war on the morality scale but that was not always an option.
As for EU, slavery was part of the times. To ignore it does not seem appropriate. But if there is an option to change slaves to some other trade good, I do not see what would be wrong with that. But it would be good if there was a counterbalance to slavery. Revolts would be a good idea.