John L. Lewis was a very important leader in the United States. He was an advocate for workers and worked to make sure that all workers were treated fairly and were paid more. He was a leader of the United Mine Workers union and was a big part of helping miners get better pay and working conditions. He also led the way in helping workers form unions and fights for their rights. In the end, he helped make life better for all sorts of workers including miners, factory workers, and even auto workers. His work to make sure everyone was treated equally and given fair wages is something we can all learn from.