This document provides a brief history of U.S. immigration laws and policies from 1790 to present day. It discusses the establishment of immigration quotas and restrictions over time. It also outlines current legal immigration pathways including family-based, employment-based, and humanitarian categories. Additionally, it presents arguments for and against granting permanent residency status to illegal immigrants currently living in the U.S. While some argue it would benefit the economy and integration, most argue it would encourage more illegal immigration and strain social services. There is no clear consensus on the issue.