What were some of the political social driving industrial growth from 1870 to 1900 in the US?

From 1870 to 1900, political factors such as the implementation of pro-business policies, including tariffs and subsidies, fostered industrial growth in the U.S. The government often supported the expansion of railroads and infrastructure, facilitating commerce and market access. Additionally, the era saw a rise in laissez-faire economics and limited regulation, allowing industries to flourish. Socially, a growing urban workforce, fueled by Immigration and rural migration, provided the labor necessary for industrial expansion.