"in ww1 it was called 'shell shock, in ww2 same combat condition was called 'battle fatigue', by the Korean war the very same condition was called 'operational exhaustion' any last traces of humanity have been completely squeeze out of it, we got to Vietnam and it was named 'post-traumatic stress disorder. if it was still 'shell shock' veterans might have received the attention they needed" what does this quote mean? How is humanity squeezed out?