To truly grasp the roots of America's political polarization, economic inequality, public health crises, and democratic collapse, we must examine the country's longstanding regional divides. In Nations Apart, Colin Woodard--an expert on North American regionalism and European ethnonationalism --delves into how centuries-old settlement patterns and the cultural geography they created have shaped today's most contentious policy debates and brought American democracy to the brink. Drawing on original, quantitative research conducted through Woodard's university-based think tank project, Nations Apart offers a fresh perspective on the issues most threatening our national cohesion, including: