What is the point of him saying that the Catholic church's councils "have often
erred (made mistakes) and contradicted
themselves"?

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

hope this

rosevelt. 1973. "slaves everywhere"

we need the map to answer the question

set times for each and always know when there coming