Calvin Coolidge was the 30th President of the United States, serving from 1923 to 1929. A member of the Republican Party, he was known for his quiet demeanor and strong support for business and limited government. Coolidge's presidency is often associated with the economic prosperity of the Roaring Twenties, and he famously advocated for a hands-off approach to the economy, believing that government should interfere as little as possible in the lives of citizens and businesses.