mastersracer said:there are large geographical disparities in the incidence of various cancers but there are no societies in which it is 'unheard of' and no relation to 'naturalistic' societies - that's just a myth...
To be more accurite there are societies ( as apposed to nations) were some of the major cancer types afflicting much of the developed world are virtually unheard of but rather than get into the semantics heres a list of cancer death rates from many major countries around the world.
By understanding why theres such large disparity there is much to learn.
http://rex.nci.nih.gov/NCI_Pub_Interface/raterisk/rates39.html