I see how my assumptions about the purpose of helmet were wrong, but I don't see how I was derailing the thread. I was simply trying to say that combatants with superpowers such as elves, fighter pilots, dragons, etc. may be subject to speeds and forces where a helmet would have to be unjustifiably heavy to be effective. I get your point that the helmet protects you from shrapnel and from being knocked around, not just from blows. however, I think I may have some sort of point, because, looking at pictures, WWII pilots didn't wear helmets either. They may be helpful and even lifesaving, but they clearly aern't an overwhelming necessity, or in the 25 years of air combat experience the world had, someone would have thought of giving the most valuable 'soldiers' the protection all other combatants would have had.