The article explores why people feel so strongly about their nations and how these feelings have developed over time. It looks at how nations were created, how they spread globally, and the factors that influenced this process. The researchers discuss the role of religion, changes in political systems, the impact of capitalism and print media, the use of language, and shifts in how people perceive time. They show how nationalism originated in the Americas and was later adopted by movements in Europe, imperial powers, and anti-imperial resistances in Asia and Africa. The revised edition includes new chapters on the influence of colonialist mindsets on Third World nationalism and how nations worldwide came to see themselves as ancient.