"The Transforming Aging Populations and Urban Design, by David R. Williams, examines the impact of aging populations on urban design. The book argues that as cities become more age-friendly, they will become more livable for everyone. Williams begins by discussing the challenges facing aging populations in cities. These challenges *Increased rates of chronic disease and disability *Social isolation and loneliness*Poverty and economic insecurity*Housing and transportation difficulties Williams then goes on to discuss how urban design can be used to address these challenges. He argues that cities need to be designed in a way that makes it easier for older adults to get around, stay active, and connect with others. Some of the specific design changes that Williams suggests more walkable and bikeable streets*Building more affordable housing near public transit*Providing more opportunities for social interaction, such as community gardens and senior centers *Designing public spaces that are accessible to people of all ages"