Gladwell delves into concussions and how the effect players later in life. I wasn't sure where to post this, but this seems like as good as a spot as any. It is a fantastically written article.
Malcolm Gladwell tries to compare dog fighting to football and in someways does so well. It may be my own biases, but it seems to be a weak comparison but one that does get his point across.
The thing I think is most important is to get funding for older players and retired players to treat and care for the higher risk of dementia.