What was a major pull factor that brought immigrants to the united states between 1830 and 1850?

The industrial revolution was very attractive to many immigrants at the time as it meant economic development and jobs, which pulled immigrants to immigrate to the USA. In which the industrial revolution boomed.

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.

The middle east is where the domestication of animals began