2. The second wave of migration to the United States occurred in the late 19th and early 20th centuries, and was primarily composed of immigrants from Southern and Eastern Europe. These immigrants came to America for many of the same reasons as the English settlers, but they also faced additional challenges, such as discrimination and poverty.
3. The third wave of migration to the United States began in the 1960s and continues to the present day, and is primarily composed of immigrants from Asia and Latin America. These immigrants come to America for a variety of reasons, including economic opportunity, family reunification, and political freedom.