Harriet Tubman, helped 300 enslaved humans escape to freedom. Which helped end slavery in the US, if it wasn’t for her and many others there’s a chance slavery could’ve been a thing still. She helped end slavery or else some of us wouldn’t be able to go to school and get jobs, as some of us would be enslaved cleaning, cooking, locked up, etc. She also helped create the Underground Railroad, to help enslaved humans escape, which is now part of history.