How did laborers try to fight for workers rights in the Gilded Age?

What pact signed on 1949 reinforce that the united states would not return to an isolationist policy

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?