Fewer high-wage workers and more low-wage workers; also, many companies moved down to southern states, where unions were not as strong. Ronald Reagan broke the PATCO strike in 1981.
Not just southern states, but also other countries. The biggest one was China, which opened up in the 90s. But also the former Warsaw Pact countries with the fall of the Soviet Union, India and a bunch of other ended up part of the globalized supply chain. Then you have women entering the work force, who ended up mostly in non union jobs. Oh and new industries rarely unionized.
Fewer high-wage workers and more low-wage workers; also, many companies moved down to southern states, where unions were not as strong. Ronald Reagan broke the PATCO strike in 1981.
Short answer: republicans.
Not just southern states, but also other countries. The biggest one was China, which opened up in the 90s. But also the former Warsaw Pact countries with the fall of the Soviet Union, India and a bunch of other ended up part of the globalized supply chain. Then you have women entering the work force, who ended up mostly in non union jobs. Oh and new industries rarely unionized.