In 1840, the population of Chicago was only 4,470. By the 1900, the city's population was 1,698,575. Which factor best explains the population change?

http://physics.bu.edu/~redner/projects/population/cities/chicago.html

http://en.wikipedia.org/wiki/Demographics_of_Chicago#Population

Let us know what you think.

Anyone answer it.

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To determine the factor that best explains the population change in Chicago between 1840 and 1900, we need to consider various factors that could have contributed to this increase. Population change is influenced by multiple factors, such as birth rate, death rate, immigration, emigration, economic opportunities, industrialization, urbanization, and other socio-economic factors.

To find the best explanation, we can analyze historical data and consider several potential factors. Here are a few factors that could have contributed to the population change in Chicago during this period:

1. Immigration: Chicago experienced significant waves of immigration during the late 19th and early 20th centuries, particularly from countries like Germany, Ireland, Poland, Italy, and later from Eastern Europe. The prospect of economic opportunities and a better life in America attracted large numbers of immigrants to cities like Chicago.

2. Industrialization: This period saw rapid industrial growth in America, and Chicago became a major industrial center with its meatpacking industry, steel production, and other manufacturing sectors. The expanding job market and the need for workers likely attracted people to move to Chicago seeking employment opportunities.

3. Urbanization: Many people moved from rural areas to cities during this time due to the opportunities presented by urban areas. Chicago grew into a thriving city with expanded infrastructure, improved transportation, and better access to services like schools, healthcare, and cultural institutions.

4. Economic opportunities: Chicago's growth was fueled by the development of trade, commerce, and the establishment of the Chicago Board of Trade, which became the world's largest commodity exchange. These economic opportunities drew people from various backgrounds seeking employment and a better quality of life.

Considering the factors mentioned above, it is likely that a combination of immigration, industrialization, urbanization, and economic opportunities contributed to the significant population change in Chicago between 1840 and 1900. It is important to note that the relative importance of each factor may vary, and other underlying factors may also have played a role.

To further investigate and gain a more comprehensive understanding, one can consult historical data, books, articles, and research papers that specifically analyze this period in Chicago's history.