The article talks about avg. lifespan of “Elite class” , perhaps you missed that point. Right now avg. life expectancy in western world is around 75-80 and this is for all classes.
The average lifespans of the elite class were 59–84.3 years in the **Middle East](http://www.paklinks.com/wiki/Middle_East).and 69–75 in Islamic Spain](http://www.paklinks.com/wiki/Al-Andalus) However these are likely to refer to modal age at death rather than life expectancy**
And when you give such a wide range 59-84.3 … you know that is not a fact. 