A critical element of any future immigration reform will be the legalization of illegal immigrants. Previous immigration reform proposals have failed, largely because policymakers disagreed over whether and how to legalize illegal immigrants. Alex Nowrasteh and David Bier write in a Cato Institute policy brief that future immigration reform proposals must be different from previous proposals if there is any hope of them becoming law. Past legalization reforms introduced by members of Congress were too similar to one another. They all failed. Our proposals provide three new means for legalizing illegal immigrants that will overcome some of the main political objections in the past: 1) Legalizing immigrants through a tiered system, whereby illegal immigrants can choose to either be legalized quickly and cheaply without the ability to gain citizenship in the future or begin a lengthier and expensive path toward citizenship; 2) Rolling legalization by allowing long-term illegal immigrant residents to legalize their status on an ongoing basis without an application cutoff date; and 3) Slowing chain immigration by limiting legalized immigrants’ ability to sponsor family members from overseas for lawful permanent residency (LPR) or green cards.