The early 20th century refers to the period from 1900 to the 1940s, marked by significant social, political, and technological changes. This era saw the rise of industrialization, which transformed economies and led to urbanization as people moved to cities for work. Innovations such as the automobile and radio changed daily life and communication. World events during this time included World War I (1914-1918) and World War II (1939-1945), which reshaped global politics and borders. The early 20th century also witnessed movements for women's suffrage and civil rights, laying the groundwork for future social changes.