Upton Sinclair, Frank Norris and Ida Tarbell made their greatest contributions to the Progressive movement by (4) publishing books and articles to expose the problems of society. Upton Sinclair wrote a book which showed the dangerous and unsanitary lives workers of the Meatpacking District went through on a daily basis, Frank Norris exposed the struggle railroad workers go through with their bosses and the unfairness of the railroad workers life in California and Ida Tarbell wrote about the manipulative men behind the oil trade.
They learned the earth was much older than they had previously thought. Gradual processes changed the earth's surface. Fossils could tell the age they came from.
Social Darwinism because the Europeans made the argument that in nature, the Europeans were the “survival of the fittest” thus needed to imperialize Africa.
