The so called "Roaring Twenties" were a time of false prosperity in the United States. Before the 1920's, in a time referred to as the Progressive Era, the three Progressive Presidents pushed for increased government involvement in the economy by creating regulations and trust busting. In the 1920's, everything took a turn for the worse. Government involvement in the economy decreased, allowing big businesses to thrive, while the smaller businesses fell. The economic policies of the three Conservative Republican Presidents were the leading cause of this economic downturn and the decrease in government involvement, which ultimately resulted in the Stock Market Crash of 1929.