Final answer:
Between 1890 and 1921, nearly 19 million immigrants arrived in the United States, impacting the country's demographics and culture significantly.
Explanation:
Between 1890 and 1921, almost 19 million immigrants arrived in the United States from various countries such as Russia, Poland, Greece, Canada, Italy, Mexico, and Japan.
During the Progressive Era, this influx contributed significantly to the growth and diversity of the population, shaping the cultural landscape of the nation.
Concerns regarding job competition and cultural changes led to the implementation of quotas by the government in the 1920s to regulate immigration into the country.
Learn more about Immigration to the United States in the late 19th and early 20th centuries here:
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