I’m not sure why you seem to think international trade is bad? You can’t prevent international trade from affecting domestic trade by using separate currencies

I’m not sure why you seem to think international trade is bad? You can’t prevent international trade from affecting domestic trade by using separate currencies. Goods traded internationally are produced domestically. You can definitely outlaw international trade, but this would reduce wealth and productive capacity by reducing access to capital goods. Just look at any country that has been isolated from international trade through embargo (Iran, Cuba, Myanmar, North Korea, etc.). What reasoning leads you to believe importing soy from China drives up rent prices for retirees?