The Cold War lead to the development of the First-World (United States and its allies) Second-World (Soviet Union and its allies) and Third-World (countries not allied with either superpower and with no nuclear programs) system of classifying countries. "Third-World" is the only term in this system still commonly used today, and it typically denotes an unindustrialized or still industrializing country. | The Cold War lead to the development of the First-World (United States and its allies) Second-World (Soviet Union and its allies) and Third-World (countries not allied with either superpower and with no nuclear programs) system of classifying countries. "Third-World" is the only term in this system still commonly used today, and it typically denotes an unindustrialized or still industrializing country. |