Re: Cotton - even if every ill-treated cotton worker suddenly became a well-treated union member, there's still the huge moral problem of how much of the Earth's scarce fresh water and farmland are devoted to growing cotton - when millions of poor people face grim shortages of food and safe water. I admit that being an old geezer makes it easier, but my approach is to buy far fewer new clothes & textile products than the average American. That strategy completely fails to grant me 100% moral purity on the issue. OTOH, it does far more good than fashionable kids decrying the deplorable status quo.
