"We should expect to see signs of PTSD everywhere. It should be absolutely pervasive in a source-base produced almost entirely by, for and about combat veterans

"We should expect to see signs of PTSD everywhere. It should be absolutely pervasive in a source-base produced almost entirely by, for and about combat veterans, in societies where military mortality exceeded modern rates by a robust margin. And it simply isn’t there." Or perhaps it's so ubiquitous it's not mentioned. There are many about everyday life that don't appear in the historical record simply because they are so common.