The consequences of longer lifespan to social order are unimaginable. Even increase by dozen of years may result in wars and chaos, especially if the treatment will not be available to everyone. From where I stand it seems that relatively little resources are spent on the research of consequences of longer lifespan compared with the discussions we have about friendly/enemy AI, machines replacing jobs, universal incom…
Don't worry, the treatment won't be available to all, unless it's a cheap pill with no IP constraints on it. Imagine the profits for the producers of a life extending miracle drug. It would be more like spice on Dune. Hmm... if I recall correctly, the fremens (who had unlimited access to it) were a bloody waring bunch.
They were, but not because they had spice. They had spice long before they became a bloody warring bunch. The interplanetary jihad was at the behest of Paul Muad'dib. The Spartan and militant culture that existed before Muad'dib was mostly out of self preservation in the face of a brutal Arrakis environment and colonial oppression.