Arthur C. Nelson, FAICP, is Presidential Professor of City and Metropolitan Planning at the University of Utah, where he is also director of the Metropolitan Research Center.Robert E. Lang is the director of Brookings Mountain West and a professor of sociology at the University of Nevada–Las Vegas; he is also a nonresident senior fellow of the Brookings Institution, Washington, D.C.

• 1. From Cities to Megaregions 2. Megapolitan Convergence 3. Defining What is Megapolitan 4. The Rural-Megapolitan Continuum 5. Megapolitan Areas as America’s New Economic Core 6. Megapolitan Attractiveness 7. Key Population Trends 8. Megapolitan Cluster and Megapolitan Development 9. Transportation Planning and the Megapolitans 10. Implications of Megapolitan Clusters and Megapolitan Areas for Land, Air, and Water Resources 11. Cascadia Megapolitan Cluster 12. Sierra Pacific Megapolitan Area 13. Southwest Megaregion 14. Mountain Megapolitan Cluster 15. Texas Triangle Megapolitan Cluster 16. Twin Cities Megapolitan Area 17. Great Lakes Megapolitan Cluster 18. Florida Megapolitan Cluster 19. Piedmont Megapolitan Cluster 20. Megalopolis Megapolitan Cluster 21. The Megapolitan Century and U.S. Demographic Change to 2100