I warmly recommend a Norwegian philosopher called Lars Fr H Svendsen and his books The philosophy of Evil and The philosophy of Fear!
I am not sure about the first book but the second is available in many languages for example English.
You are more than welcome to get back to me if you don´t find these books etc and then I can give you some other suggestions and/or write a personal summary of his admirable works for you.
I´m sorry for not getting back to you sooner - it´s been a hectic week. Anyway, I´ve got you the data on the book (see below). You can find at for example Amazon and as Electric book at for example avaxbooks.me.
I hope this can be of any help to and good luck with everything!
my pleasure! Are you working on a paper or the like? A detailed mapping of terrorism (and other examples of extreme human behaviour) can learn us a lot on human nature in general and in specificon our possibilities to act freely and be held responsible for our actions.
To me, that is the most significant feature of being human AND (which is worse) an ability which we have assigned ourselves without proper scientific evidence.
One must remember that this supposition forms the Foundation of Penal Law worldwide! Following the same order of reasoning, madness is appointed Enemy number one to criminal responsibility which means, if my logic isn´t totally out of order, that mental illness (together with other aggressors like brain tumours or poisoning) constitutes the largest threat by far of being considered human instead of something else.
So, in the worst case scenario us human has assigned ourselves a feature we have not AND identified the worst enemy to that non-provable feature as madness/ mental illness
I heard a keynote by Wim Meeus at the EARA 2016 conference on the topic of youth and terrorism, which was excellent! He had a theoreticla model explaining the social and psychological mechanisms leading to acts of terrrorism. Recommend you take a look at Meeus work (don't know whether published as such yet).