In a message dated 9/22/98 3:05:22 PM EST, [log in to unmask]
writes:

<<
 I think the other part of Ray's answer is that there are few, if
 any, places in the world where the vegetation could keep a
 vegetarian alive *year-round* >>
More important, I think, is that there were no superimposed constructs as to
eating all vegetables and no animals at that time...and I can imagine these
people trying just about everything that became available---and learning to go
back to some and actively avoid other food sources---for reasons of taste or
poisoning or less severe ill effects. Year round is a long time.