The Progressive Party is a political party in the United States that emerged in the early 20th century, primarily advocating for social reform and increased government intervention in the economy. It was founded in 1912 by former President Theodore Roosevelt after he lost the Republican nomination. The party aimed to address issues like labor rights, women's suffrage, and the regulation of monopolies. The Progressive Party gained significant attention during its peak but eventually declined in influence. It played a crucial role in shaping modern American politics by promoting ideas that later influenced both the Democratic Party and the Republican Party. The party's legacy continues to inspire various reform movements today.