Contributors to Economic Opportunity
Many American entrepreneurs aided the formation of cities by creating job opportunities within them. With Andrew Carnegie's contribution of creating the first way to mass produce steel, and steel relevance at the time, many jobs and factories were created because of it. Carnegie's steel production made the city of Pittsburg. During this time many cities started to sprout up around industrial centers. John D Rockefeller created oil refineries in Ohio, and grew the city of Cleveland by doing so. Cornelius Vanderbuilt created the New York Central Railroad, which connect Boston and New York. With the increased ease of trade and commerce, more jobs were readily available.