19001999
19001999 refers to the period spanning the years 1900 to 1999, commonly treated as the 20th century. It was defined by rapid modernization, population growth, and profound political and cultural change across the world.
Politics and conflict: The century saw two world wars, revolutions, and many regional conflicts. World War II
Science, technology, and everyday life: Aviation, motor vehicles, telephone, and later radio and television transformed communication
Society and culture: Social movements expanded rights for women and ethnic minorities, while labor and education
Economy and demography: The Great Depression of the 1930s highlighted economic volatility, followed by postwar growth
Legacy: The 1900s–1990s established political borders, scientific paradigms, and cultural practices that continue to influence the