>>smoky wood and charcoal fires
And cow dung, too, in poverty stricken rural areas, a very smoky but intense heat emitting substance.
Holy Cow!
Countries imposed tariffs in hopes of boosting domestic production. International trade and global commerce plummeted. The rest is common knowledge.
Unless you want to be growing your own food and making everything you use international trade is the way to go. And international trade and commerce does not prevent you from doing the former. Keyword: freedom.