Due to the innovation of leaders in the medical field, medicine has improved over the course of history. Posted by Saul Salas in American History - Jonas - X on Thursday, January 29, 2015 at 10:46 am Check my google doc if you want to see the amazing if you want to embark in a WILD journey through time starting as late as the 1600s of my NHD filled with tons of sources including primary! Click THIS to find out more! Comments No comments have been posted yet. Log in to post a comment.