John L. Lewis was a prominent American labor leader known for his role in the United Mine Workers of America (UMWA). Born on February 12, 1880, in Iowa, he became a key figure in advocating for miners' rights and better working conditions during the early to mid-20th century. Lewis was instrumental in organizing strikes and pushing for labor reforms, significantly impacting the labor movement in the United States. In 1935, Lewis helped found the Congress of Industrial Organizations (CIO), which aimed to unite workers across various industries. His leadership style was assertive, and he was known for his ability to mobilize workers and negotiate with employers. Lewis's contributions to labor rights have left a lasting legacy in American history.