It's tough to tease out the causation in mental health epidemiology. Are there more PTSD cases because people are "less tough" as you say? Or are there more PTS

It's tough to tease out the causation in mental health epidemiology. Are there more PTSD cases because people are "less tough" as you say? Or are there more PTSD cases because it's more broadly understood by clinicians and patients? Or maybe there are events occurring which are likely to produce more PTSD? I think it's safe to say there is a mixture of causes, and we should always shy away from a single causal explanation like "tougher before".