Oh sorry, I forgot to look at my D&D alignment charts before making my comment, I didnt realize that slavery was evil and thus impermissible. I guess there's no possible comparison to be made with other economic practices that cause massive harm to some people, but benefit others in the short term.

For the sake of argument though, what if we lived in a situation where a very large portion of our agriculture, and other vital forms of economic activity were reliant on slavery? What if there were alternatives, but they weren't quite as economically entrenched, and an overnight banning of slavery would cause an economic collapse that'd cause large scale suffering.

In this hypothetical scenario, would we say that slavery is a net good for humanity? Wouldn't it be okay for our pension funds to invest in more slave production?