On top of that, he can survive torture without suffering from post-traumatic stress symptoms.

PTSS almost seems like a culture-bound syndrome of the modern West. In particular there don't seem to be any references to it before WWI and even there (and in subsequent wars) all the references seem to be from the western allies. Furthermore, the reaction to "shell shock", as it was then called, during WWI suggests that this was something new that the established structures didn't know how to deal with.