Dr. Rob Lutton introduces the value to the historian of studying groups and individuals who were given the label of ‘heretics’ in the later middle ages. These groups point to diversity in society and the religious label points more to their perceived disruptiveness than to disputed points of doctrine.
Other videos you wish to look at:
Why Study Lollardy with Rob Lutton http://youtu.be/bvNUEaP3kAA