The Industrial Revolution in the US allowed it to become the world's leading industrial power by the 1880s due to government investment in business, private investment, and liberal immigration laws. The government invested in railroads and did not regulate business. Private companies formed monopolies and trusts. Immigration provided cheap labor despite poor working conditions and urban poverty. Workers organized unions to demand better treatment, striking and joining groups like the Knights of Labor, while companies resisted changes through lockouts and blacklists.