Free World is a term that had its vogue during the Cold War

Cold War

The Cold War was the continuing state from roughly 1946 to 1991 of political conflict, military tension, proxy wars, and economic competition between the Communist World—primarily the Soviet Union and its satellite states and allies—and the powers of the Western world, primarily the United States...

. It is also used to refer to the nations fighting against the Axis Powers

Axis Powers

The Axis powers , also known as the Axis alliance, Axis nations, Axis countries, or just the Axis, was an alignment of great powers during the mid-20th century that fought World War II against the Allies. It began in 1936 with treaties of friendship between Germany and Italy and between Germany and...

 in the Second World War

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 when the "free world" went on to eventually defeat Nazi Germany. Such use may have included the Soviet Union

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 by implication.

One of the earliest uses of the term Free World as a politically significant term occurs in Frank Capra

Frank Capra

Frank Russell Capra was a Sicilian-born American film director. He emigrated to the U.S. when he was six, and eventually became a creative force behind major award-winning films during the 1930s and 1940s...

's World War II propaganda film

Propaganda film

The term propaganda can be defined as the ability to produce and spread fertile messages that, once sown, will germinate in large human cultures.” However, in the 20th century, a “new” propaganda emerged, which revolved around political organizations and their need to communicate messages that...

 series Why We Fight

Why We Fight

Why We Fight is a series of seven war information training films commissioned by the United States government during World War II whose purpose was to show American soldiers the reason for U.S. involvement in the war. Later on they were also shown to the general U.S...

. In Prelude to War

Prelude to War

Prelude to War was the first film of Frank Capra’s Why We Fight propaganda film series, commissioned by the Office of War Information and George C. Marshall. It was made to convince American troops of the necessity of combating the Axis Powers during World War II...

, the first film of that series, the "free world" is portrayed as a white planet, dramatically contrasted with the black planet that is the "slave world," in the words of the narration. The film depicts the free world as the Western Hemisphere, led by the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and Western Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

, and the slave world as the Eastern Hemisphere, dominated by Nazi Germany

Nazi Germany

Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...

 and the Japanese Empire

Empire of Japan

The Empire of Japan is the name of the state of Japan that existed from the Meiji Restoration on 3 January 1868 to the enactment of the post-World War II Constitution of...

. The films portray the Soviet Union

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

as an ally of the "Free World", which it was, from the perspective of nations fighting Germany in World War II.