However, to my surprise I realized that the “the dirty south” also includes South and North Carolina, Florida, Georgia, Alabama, Mississippi, Louisiana, Kentucky, Oklahoma, Texas, and Tennessee overall; not just Memphis.
Please give a time frame for this question but I will still say that the answer is: <span>The major cause of the growth of the workforce was an increase in immigrants.</span>
The best policy, they claimed, was for the United States to build up its own defenses and avoid antagonizing either side. Neutrality, combined with the power of the US military and the protection of the Atlantic and Pacific Oceans, would keep Americans safe while the Europeans sorted out their own problems.
Because, predominantly in the agricultural Western region of the United States, the demand for cheap labor was extremely high at the time. The source of this cheap labor were Mexican immigrants.