Gold Rush of the middle of the century. The Civil War and its resolution only added the general motivation for the change of perspective from the East Coast to the middle of the country and the west.
             The dynamics of history and its influence over the natural environment and the eventual development of the cities in California are underlined through the analysis of the situation in the 19th century. In this sense, he points out the emergence of Chicago, "the city in a garden" and the subsequent evolution of the cities through the introduction of transportation, the electric trolley and in the end the automobile. Ind
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