19211979

19211979 refers to the historical span from 1921 to 1979, a period that includes major political, social, and technological changes that shaped the modern world. The endpoints mark notable moments such as the founding of the Chinese Communist Party in 1921 and the late 1970s, a time of energy upheavals, political realignments, and shifts in global power.

International history in this era encompasses the interwar years, World War II, and the Cold War. It saw the dissolution of some empires, the emergence of new nation-states through decolonization, and the creation of international institutions and alliances that structured postwar diplomacy. The period also witnessed the consolidation of competing blocs and the spread of different political ideologies across continents.

Social and technological change accelerated during these decades. Urbanization, mass education, expanding media access, and evolving gender roles transformed everyday life. Scientific and technological advances—air travel, nuclear energy, and the beginnings of space exploration—redefined possibilities and global perspectives. Economically, the era included postwar growth, followed by volatility and adjustment, with energy crises in the 1970s influencing policy and industry worldwide.

Historians use the 1921–1979 window as a convenient framework to analyze broad, long-term shifts in governance, economy, culture, and international relations. It also reflects the limitations of epochal labeling, since regional histories and daily experiences within this span varied widely and do not fit a single, uniform narrative.