The introduction frames the affordable housing crisis in the United States as one of the country’s most pressing social and architectural challenges. It argues that access to safe, affordable housing is fundamental to economic opportunity, public health, and social equity. The editors explain that the crisis has many interconnected causes—including rising housing costs, insufficient housing supply, restrictive zoning, economic inequality, and a history of discriminatory housing policies—so no single solution is sufficient. Instead, the book brings together architects, economists, planners, policymakers, scholars, and community leaders to examine the problem from multiple perspectives. Through essays and case studies of recent housing projects, the introduction emphasizes that thoughtful design, innovative policy, and collaboration across disciplines can help create affordable housing that is sustainable, dignified, and well integrated into communities, rather than viewed as merely a minimal-cost necessity.