Final answer:
The Second Wave Immigrants left their countries due to economic opportunities and religious persecution.
Step-by-step explanation:
The Second Wave Immigrants, including Jews from the Roman Empire, left their countries for various reasons. The main reasons for their migration were economic opportunities and religious persecution. Many immigrants sought better economic prospects in other continents, such as the United States, due to poverty and lack of opportunities in their home countries. Additionally, Jewish people from the Russian empire faced discrimination and anti-Semitism, which led to waves of violence called pogroms.