The US has undermined a trade system that worked for decades

The Great Depression of 1929 has been the most studied incident in international economics.
The economic weakness of some countries spread to others, and there is almost universal agreement that the reason was the imposition of tariffs between them.
Attempting to preserve jobs domestically, some countries kept out imports from other countries and subsidized their own exports as well. It wasn’t long before the countries targeted by such practices retaliated. Cycles of retaliatory tariffs en