The main focus of the American Progressive Movement in the early 20th century was to address the social, political, and economic injustices arising from industrialization and urbanization. Progressive reformers aimed to eliminate corruption in government, improve labor conditions, promote social welfare, and expand democratic participation through initiatives such as women's suffrage and labor rights. Key figures like Theodore Roosevelt and Jane Addams championed reforms in areas like public health, education, and workers' rights. The movement's achievements spurred significant legislation, including antitrust laws and social reforms, ultimately laying the foundation for modern American governance and the welfare state.