In 1921, significant events shaped global history. The Treaty of Versailles, which ended World War I, was still influencing international relations, leading to economic challenges in Europe. The League of Nations was established to promote peace, although it struggled to prevent future conflicts. In the United States, the year marked the beginning of the Roaring Twenties, a period of economic prosperity and cultural change. The Harlem Renaissance flourished, celebrating African American culture through art and literature. Meanwhile, the Sacco and Vanzetti trial highlighted social tensions and debates over immigration and justice.