Each part of the world developed a fitting diet.  You couldn&#x27;t expect a Russian to have fiber rich diet,  it&#x27;s mostly fat and proteins you can get during the long winters. 
I&#x27;m curious about the role of these bacteria as an anti-inflamantory.  I know many adult  immigrants coming to Canada started  to have hay fever  in matter of couple of years since their arrival. Big drop in gut flora as a result of a diet change?