Why did so many immigrants come to the united states during the 19th century?

During the 1800s, people in several parts of the world determined to flee their houses and migrate to the United States. Decamping crop collapse, country, and job deficiencies raising contributions, and starvation, many developed to the U. S. because it was regarded as the state of commercial opportunity.  Starting from the 17th to 19th centuries,  African vassals proceeded to America against their preference.

some people are just against it im not sure but i think everyone deserves to be treated equally i think people have a problem with it because its different and not like everything else i hope this !

< < < emily> > >

answer; i believe the correct answer is benjamin harrison;