What did the salzburgers contribute from moving to georgia

Why was it difficult fpr unions to succeed in the 1800s

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?

How did the industrial revolution give an advantage to industrialized european nations over non-industriallized nations?