There was a time when I might have speculated on the cause but then I learned that rather than continuously update my priors I should instead consider every piece of evidence in isolation and adhere strictly to the absolutely non-arbitrary standard of a 95% confidence interval.
When I first came home, there were months of isolation where I was too proud and too ashamed to talk about my feelings -- a downward spiral that almost ended in suicide.
Recently, I met a man who had spent more than five years in isolation at a prison in the Boston suburb of Walpole, Massachusetts, not far from my home.