"Industrialization and mass production pushed the United States into the forefront of the world. The American economy had lagged behind Britain, Germany, and France as recently as the 1860s, but by 1900 the United States was the world’s leading manufacturing nation. Thirteen years later, by 1913, the United States produced one third of the world’s industrial output—more than Britain, France, and Germany combined."
One of the many benefits of rapid industrialization was that it allowed for new jobs to be opened up to not only Americans, but immigrants too. Immigrants from all over the world seeked money, cheap land, and America in the late 1800s offered that. So when immigrants came to the US, cities grew, and urbanization grew too. The more immigrants showed up, more jobs were filled. The cities and factories expanded, and more jobs were needed. This led to the United States becoming a leading manufacturing nation, which was partially caused by immigration and the opportunity the United States provided to immigrants.