This chapter helps the reader to be familiar with the demographic and social factors that influence and shape aging and disability policy over time and to be aware of policy changes over the past century within disability and aging public policy. It explains the contrast between advances in science and technology and public policy related to people growing older and people with disabilities. Landmarks serve as essential tools to help us recall specific historical events in time. Historical landmarks, science, and technology have played significant roles in the evolution of social policies; however, aging and disability policies may not have made as many strides as other areas throughout history. The chapter briefly discusses: the role of historical landmarks in shaping social trends and public policies; the relationship between historical landmarks and aging and disability-related policies; and trends in policy, social, and political influences and landmarks in the United States.