@AMetroid It's the 21st century the people who are virtue signaling and shit usually only see things as black and white. Slavery is an outdated and inefficient system now, and it's also wrong by our current moral standards, that is the objective truth. however, another objective truth is that it used to be an incredibly efficient and incredibly fruitful endeavor, almost all countries had some sort of slavery, and all 1st world countries nowadays definitely had slavery some time in the past (of course talking about their ancestors).
Now whats the difference between then and now you ask? We now have a lot more intellect based jobs compared to the past, we have a better economic system that lets us afford to not have slaves (although we don't pay most of our workers well lol), and most of all, we have technology that can substitute for the work a slave would do (notable examples would be cranes, tractors, and the track laying machines. these inventions replaced works that were usually done by slaves).