Immigration to the United States is a major factor in the rapid increase of the population of slums in urban areas such as New York and Chicago. This caused absorption of tremendous culture and influenced the history of the United States. In the poverty, ethnic and American cities from 1840 to 1925, David Ward tries to find a so-called erroneous view and belief of some people negative, about the way of living in slums, slums and poor immigrants did.
Today, from the first half of the 20th century, the immigration situation to the United States dramatically changed. Since the lowest in the 1940s, the immigration rate has risen sharply. Since 1970, the immigrant population in the United States has doubled, the number doubled since 1990. In addition, today 's immigrants differ in race, skill and education. Most immigrants since the beginning of the 20th century emigrated from Europe, mainly Caucasians. In 2011, most immigrants entered the United States from Latin America to all over Asia (Vigdor, 2008; Immigration Statistics, 2012). Immigration remains an important policy issue as there is still no agreement on whether immigrants will have a positive or negative impact on American society.
Mexican immigrants in the early twentieth century were major problems affecting the influence of the United States on urban population, employment and many other aspects. From 1920 to 1929, the number of immigrants from Mexico to Mexico from the Mexico has reached nearly 500,000. - The era of progress generally applies to various correspondences to economic and social problems to achieve rapid industrialization in the United States. Although it is possible to narrow the scope of this era, paying attention to the history of Mexican-American women living in the southwestern part of the United States and the Midwest part between 1890 and 1919.
Because the descendants of Mexico living in the United States were thought to be the southwestern part of the United States due to the signing of the immigration law in 1924 known as the Johnson Reed method by 1924, it was excluded from the US policy on immigration to the United States it was done. It is an important part of the agricultural industry. In 1924 the Immigration Control Act stipulates that it is legal to limit the number of immigrants from any country to 2% of those already residing in the United States. There was no change in America 's immigration policy and the Great Depression from Mexico to 1929. The recession in most industries in the United States, especially the recession in the agricultural industry in the southwestern United States, has caused a major change in the attitude of US policy makers to Mexican immigrants. Due to the lack of labor, thousands of workers are forced to return to the territory of Mexico