Question

John Brown,Harriet Tubman,Harriet Beecher Stowe,Stephen Douglas, all opposed slavery. Who do u think had the greatest impact on American history and why??

Answer 1

I think it was Harriet Tubman, as she was born a slave and understood what it meant to be a slave, she had to escape in 1849 and her motive to help slaves was a powerful one "Families should not be separated". 
She became the most famous conductor on the Underground Railroad. She helped many slaves individually as well as formed a network to help them through other activists.