I have a different view.
I suspect, given the likely societal breakdown coming due to deminished standards of living, increasing crime, overpopulation in urban areas ect., we will see a more authoritarian governance and a rapid reduction in litigation.
Central authorities will see a need for a national blood sport through which the people's growing anger and restlessness may be directed. I predict no helmets, little padding, to targeting rules etc.
Further,American football is likely to become an international sport, serving as a less costly alternate to traditional warfare. This is likely to occur after a limited nuclear exchange convinces the world that the transition to football as a necessity.
Look for marquee matchups such as Israel v Iran and China V Japan to settle territorial disputes that would once have led to war. Image massive defense dollars going into football strategy, as well as the genetic engineering of linemen/ gorilla hybrids designed to play the trenches.
Games will bloody, careers short, fatalities not uncommon. And the stakes? Higher than ever.
In short, we have yet to see the golden age of football. We're in for a thrilling ride.