What are three major changes, which have occurred in the American population in the twentieth century?

Question

Do you believe we need to impose more controls on immigration into the United States?

Answer 1

The rise in the Latino population. A rapid increase in the chinese population and latterly a rise in the Eastern Europeans. Unsure as to whether more controls would hinder or help. Immigrants traditionally work in industry and agriculture. Without them there would be real problems in these areas

Answer 2

technology, the influx of immigrants (diversity), ..can't think of another