My friend here is AZ plays Rugby. I go to a match a week. Never once have a seen a concussion (small sample size, I know). But the WAY they tackle is different. Just as hard, but you have to have a better sense of self preservation so the technique is different. I'm not saying we should remove helmets from the game, not at all. But there are ways to tackle a guy in which no one gets hurt (well, in the head anyway) and helmets seem to do as much damage as they prevent.