Which factor had the greatest positive effect on late nineteenth century american industrialization?

Between the beginning of the decade of 1780, at the end of the War of Independence, and 1914, at the outbreak of the First World War, the United States went from being a country with a small population, distributed over a large territory, to be the nation with the highest per capita income in the world and the leading industrial country, surpassing Great Britain since the late nineteenth century. Between 1896 and 1900, the United States generated 30% of world industrial production, while in that period, Great Britain was responsible for 20%, and Germany, 17%.

The positive factor that most influenced the industrialization of the USA was the large number of immigrants who arrived in the country, and therefore the cheap labor force.

africa

explanation:

it's not the readmission