Why do people immigrate?

The main reason people immigrate is because they are looking for a better life in the United States. Some people think it is better in the United States because there are more opportunities for a better life. Though it comes through hard work. I know that the family from my dad’s side emigrated from Korea to Mexico and other places to escape the Japanese because they were treating people very badly.
Sometimes people have to immigrate because of their jobs; because they are not being paid enough and cannot support their family, bad working conditions, or they are being transferred. Some also immigrate for political reasons; they don’t like their government or their rights are being neglected. The violence or the crime rate could be very high and they want to immigrate to keep their family safe. They also immigrate to be closer to their family members who live in other places. People also immigrate because of the economy, for personal growth, or they were successful in something somewhere else.