The increase in longevity is disrupting the 20th-century retirement model. Our longer lifespans, though a blessing in many respects, has been a shock to the collective system. While Social Security and Medicare provide cushions, too few people have adequate savings and investment to support lifelong needs. The shift away from pensions and defined benefit plans has exacerbated insecurity. People need to work and earn longer to survive and thrive in a world of rapid change. As we come to grips with the opportunities and challenges of longer lives, what will 21st-century retirement look like? What policies and practices should be implemented to enhance wealth, health, and engagement for a better future?