Music recorded in 1920
1920 was the year when the post-World War I order began to take shape as treaties and institutions, while at the same time revealing instability in various regions. The Treaty of Versailles came into effect on January 10, 1920, and the League of Nations was officially established the same day. Postwar settlement did not mark the end of the war, but rather cemented issues such as borders, sovereignty, minorities, reparations, and mandates as ongoing political challenges around the world. Peace treaties, such as the Treaty of Trianon on June 4 and the Treaty of Sèvres on August 10, significantly redrawn the map of Central Europe and the Middle East, foreshadowing future conflicts. In the Arctic, the Svalbard Treaty (formerly known as the Treaty of Spitsbergen) was signed on February 9, 1920, establishing an international framework for resources, trade, and non-military use.
Meanwhile, postwar social tensions shook domestic politics in various countries. The Kapp Putsch (March 1920) occurred in Germany, demonstrating the fragility of the post-revolutionary regime. In Eastern Europe, the Polish–Soviet War continued, with the Polish victory in the Battle of Warsaw (August 12–25, 1920) turning the tide of the war. In Ireland, the Government of Ireland Act 1920, which aimed to reorganize the governing system, was ratified on December 23, 1920, furthering the institutionalization of divide and rule.
The dynamics of colonial rule and nationalist movements also accelerated. In India, the Noncooperation Movement (1920–1922) led by Mahatma Gandhi (1869–1948) gained momentum, making mass mobilization and nonviolent resistance visible as key methods of modern politics. In Japan, the first May Day was held in Tokyo on May 2, 1920, with demands regarding working hours, unemployment, and other issues expressed in public spaces. The spread of these social movements expanded the scope of urban culture and popular entertainment, strengthening the conditions under which music and entertainment reflected the "atmosphere of politics and life."
In the United States, the Prohibition era began with the enactment of the National Prohibition Act (commonly known as the Volstead Act) on January 17, 1920, dramatically transforming urban nightlife and underground economies. The Nineteenth Amendment to the United States Constitution went into effect on August 18, guaranteeing women's suffrage under the federal constitution. The same year was also marked by economic upheaval, with the United States and other countries experiencing the 1920–1921 Recession, highlighting the painful transition from a wartime economy to peacetime. Political violence also became a reality, with the Wall Street bombing of September 16, 1920, becoming a symbol of urban tensions and insecurity.
The Antwerp 1920 Olympic Games (April 20 – September 12, 1920) were also significant as a stage symbolizing the "reopening" of the international community. The Olympic flag was raised for the first time at the opening ceremony, and Belgian fencer Victor Boin (1886–1974) was the first to take the Olympic oath, establishing the modern form of sport, endowed with ritual and media. In the field of science, a "great debate" was also held regarding the worldview. The Great Debate (Shapley–Curtis Debate), held in Washington, D.C. on April 26, 1920, between Harlow Shapley (1885–1972) and Heber D. Curtis (1872–1942), focused on the positioning of the Milky Way and spiral nebulae, and called into question the scale of our view of the world itself.
The intersection of broadcasting and recording marked a decisive change in the "public ear" of this era. On November 2, 1920, Pittsburgh's KDKA broadcast the presidential election results, marking the beginning of radio broadcasting's significant role as a means of conveying public information. On the recording front, Mamie Smith's (1883–1946) "Crazy Blues" was recorded on August 10, 1920, and released that November. This song is often cited as a milestone in the commercial recording of an African-American female singer, and it served as a marker for the subsequent reorganization of the repertoire and market in the American recording industry. Furthermore, films, such as The Cabinet of Dr. Caligari (1920), a masterpiece of German Expressionist cinema, also shaped urban anxiety and psychology, deepening the foundation of popular culture by combining music, film, and entertainment with the same audience. The 1920s was a turning point in which postwar institutional design, social movements, economic change, disasters and violence, and new media circuits all intertwined simultaneously, rapidly creating an environment that would later shape the "sound of the 1920s."
