>Should a company be allowed to do business with a company that owns slaves?
They do, all the time. Manufacturing, mining (particularly of the rare earth metals that go into electronics) and agriculture all depend on slave labor.
It certainly should be illegal, but a lot of the comforts of first-world civilization would vanish and the velocity of modern capitalism would grind to a halt, so politically speaking apart from token gestures that don't threaten the status quo that isn't likely to happen.
No, because slavery is illegal.
>Should a company be allowed to do business with a company that owns slaves?
They do, all the time. Manufacturing, mining (particularly of the rare earth metals that go into electronics) and agriculture all depend on slave labor.