there MAY have been another lone-wolf attack in Ohio. I am not really focusing on the attack (which may turn out to be completely unrelated to Jihad, or we may never know), but it got me thinking and led to a this series of tweets:

https://storify.com/omarali50/lone-wolves-and-psychos

So the question is this: What is the history of lone wolf terrorism? is there a proper definition? what started such sprees and what ended them? What ideologies/religions/circumstances make it possible or encourage it? What kind of person goes for it?
And so on. If this is already written somewhere, can we have a link?
Thanks