before big
now smaller
before more industrial/factory/manufacturing
now many are for service type jobs like nursing
other countries employees are assumed to be a part of union and if they have to prove to that are not part of union if they dont want to be
in the US employees are assumed to not be part of a union and they have to prove to that are part of a union if they want to be
1980s president reagan hurt unions big way by destroying the air traffic controllers union (patco) because they went on strike in the name of national security, even though that union & other unions had supported him in the 1980 election