I don't have a login for that. Funnily enough...

The move to agriculture from hunter-gatherer did cause a (big) drop in life expectancy, and they use those numbers:
http://www.rewild.com/in-depth/longevity.html

Also the stats are done "from birth", including child-mortality, which can skew results.
http://www.ancient-origins.net/news-evolution-human-origins/life-expectancy-myth-and-why-many-ancient-humans-lived-long-077889

Plenty more out there on this - I just did a quick search.

I take it you believe the cult-propaganda you were programmed with relentlessly at school and in front of the TV: "That this is the best society that's ever existed"?

Sorry to pop the old bubble mate, but it's all lies. This western 'culture' is more 'cult' than the Moonies...

Actually, reminds me, I just watched this on cult-behaviour. Listen, and see if you think government fits the bill of 'cult' according to the official definitions... ;)