1920 — overview of a pivotal year

Political and international developments

The year continued the transition from the First World War to an unsettled interwar period. The Covenant of the League of Nations came into effect and the organization began functioning as an international forum. Several treaties and mandates rearranged territories of the defeated empires, while regional conflicts — notably in eastern Europe and the Middle East — shaped new borders and national movements.

United States and other domestic changes

1920 saw important legal and social shifts. In the United States prohibition of alcoholic beverages was enforced nationally, and women obtained the right to vote when the Nineteenth Amendment was ratified. The U.S. presidential election of 1920 brought a return to conservative politics, and radio made its first widely reported commercial broadcasts during that campaign.

Culture, public health and economy

Social life began to move toward what later became known as the Roaring Twenties: jazz and new urban cultures expanded, sports and cinema grew in popularity, and the 1920 Summer Olympics were held in Antwerp as a symbol of recovery. The global influenza pandemic that began in 1918 declined during 1920, though its effects lingered. Economies experienced postwar adjustment; a sharp but brief recession started in 1920 and continued into the following year.

Notable firsts and lasting significance

• Emergence of regular radio broadcasting and the beginnings of mass media politics.
• Major diplomatic reorganizations that shaped the modern Middle East and parts of Europe.
• Social reforms and cultural movements that set the tone for the interwar decades.

Overall, 1920 is remembered as a hinge year: it closed the immediate post‑war crisis while opening new political, cultural and technological directions that defined much of the twentieth century.