The U.S. has more immigrants than any other country in the world. It also has a very extensive and complex immigration system. Our researchers have distilled much of what we know about immigration into a five-part email mini-course. Sign up today to enhance your understanding of this important topic: https://pewrsr.ch/2qaXJWo 𝐖𝐡𝐚𝐭'𝐬 𝐨𝐧 𝐭𝐡𝐞 𝐬𝐲𝐥𝐥𝐚𝐛𝐮𝐬? • Lesson 1: Who are today's U.S. immigrants? • Lesson 2: Who are legal immigrants, and how do they come to the U.S.? • Lesson 3: W

Animated map shows the history of immigration to the US. | Business Insider