Check out this post by Good Housekeeping on the "125 Women Who Changed Our World". Great List with many, many women who have shaped our world!
http://www.goodhousekeeping.com/family/inspirational-people/women-who-changed-our-world#slide-1
http://www.goodhousekeeping.com/family/inspirational-people/women-who-changed-our-world#slide-1