After the Spike by economists Dean Spears and Michael Geruso is a provocative call to rethink global depopulation. As birth rates fall below replacement levels worldwide, the authors challenge the assumption that fewer people means a better future. Drawing on fresh data and compelling analysis, they reveal how shrinking populations threaten climate goals, economic growth, social equity, and human progress. Offering practical solutions, they advocate for societies that support parenting and caregiving without compromising environmental or gender goals. Urgent and eye-opening, this book reimagines a sustainable future that values every human life and collective responsibility.