Romans were far more tolerant of official corruption for one. Appointment to government positions and influence over government officials were pretty much blatantly for-sale.
There are a few unspeakable things that you can not do with paid labor but can do with slaves, you would have to be extraordinarily evil to pursue any of them which is unlikely but is a possibility nonetheless.
“The practices of slavery and human trafficking are still prevalent in modern America with estimated 17,500 foreign nationals and 400,000 Americans being trafficked into and within the United States”
And yet there are 40 million slaves in the world today, about the population of the whole Roman Empire. So it’s not exactly rare, either, at 0.5%, or 1 in 200 people.
The amount of prejudice and arrogance in your comment is appalling. According to you, I'm guessing everyone who lives outside the US or the "west" (a nebulous term at best) is in a "uncivilized country"? As another commenter said, it's not like there's no illegal slavery in the US.
Slavery has been illegal in all of the Arab countries for a while now. Foreign workers who go there might sometimes be abused by their employees who might underpay or not pay them the agreed-upon wage, but this is typically illegal and not something the government tacticly approves of, or supports. In general, most immigrant workers in these oil-rich Arab countries are free to leave at any time that they want. Moreover, these countries probably have less sexual exploitation of women, because of their conservative moral values, and since things like prostitution and the production of pronography are illegal and heavily socially frowned upon. Actual rates of rape, and sexual assault are probably also substantially lower in these countries, due to their highly protective treatment of women, the gender separation, and due to the dating/marriage norms there.
You can make your point about there being issues in other countries without resorting to that repugnant arrogant colonial-era language about you being at the "center of the civilized world". It adds no value to what you are saying whatsoever.
