How did push and pull factors lead to the creation of a diverse colonial United States

Push factors encourage people to leave their points of origin and settle elsewhere, while pull factors attract migrants to new areas. For example, high unemployment is a common push factor, while an abundance of jobs is an effective pull factor. Push and Pull Factors: Why people came to America. In the mid-1800's, a large number of immigrants crossed the Atlantic Ocean to begin a new life in America from Europe. ... Those that had some money in savings often fled to the United States. Most Irish immigrants were poor. United States for many reasons. They left because of economic, religious and political factors. Some came to avoid war, corrupt governments or religious persecution. Still others came because they couldn't find work in their own country.