It is axiomatic that if someone is sufficiently eager to disbelieve something, there is no Everest of evidence too large to be ignored. This explains today's revival of protectionism, which is a plan to make America great again by making it 1953 again.
This was when manufacturing's postwar share of the labor force peaked at about 30 percent. The decline that began then was not caused by manufactured imports from today's designated villain, China, which was a peasant society. Rather, the war-devastated economies of competitor nations were reviving. And, domestically, the age of highly technological manufacturing was dawning.