The people made worse off by slavery were those who were enslaved. Their descendants would have been worse off today if born in Africa instead of America. Put differently, the terrible fate of their ancestors benefitted them. ↗
All sensible Army people turned gas warfare down as being utterly insane since, in view of your superiority in the air, it would not be long before it would bring the most terrible catastrophe upon German cities, which were completely unprotected. ↗