At the Harvard University Graduate School of Design (GSD), affordable housing is an urgent concern in the pursuit of healthy, equitable cities. In this video—the first in a series of brief looks at the ways in which topical issues are explored at the GSD—Rahul Mehrotra MAUD ’87, Daniel D’Oca MUP ’02, and Farshid Moussavi MArch ’91 discuss strategies for rethinking the housing needs of the 21st century.