This statement is false. A massive wave of immigration to the United States was caused by various factors, including economic opportunities, political instability, and religious persecution. Throughout U.S. history, immigrants have come to the country seeking better economic prospects and the chance to improve their lives. Many were also driven out of their home countries due to political turmoil, war, or persecution based on their religious beliefs or ethnic background. For example, the late 19th and early 20th centuries saw a surge of immigration from Europe to the United States due to economic and political conditions in their home countries. Similarly, during the 20th century, political instability in countries such as Cuba and Vietnam led to waves of immigration to the United States.