Describe four of the changes occurring in the u. s. cities between 1850 and 1900

darwinism is survival of the fittest there for social darwinism is the survival of the wealthiest

polisit can also mean a body of citizens. in modern historiography, polis is normally used to indicate the ancient greek city-states, like classical athens and its contemporaries, and thus is often translated as "city-state". the body of citizens came to be the most important meaning of the term polis in ancient greece.