and for the physical argument:
Paul Tergat comes from a rich family, lived 400m next to his school and the only activity he did till he was 18-19 was to play basketball ocassional with his friends.
I walked 2,5km everyday to school and back and then always did atleast 2h of serious sport-activity in a club in the afternoon since i was 12 and well i haven't run 2:04 yet.
Jim Ryun smoked cigarettes and didn't run until 8th grade. I ran in the woods behind our house when I was 5 and always ran 2 miles to school and back home.
So this proves it conclusively.
Jim Ryun was from Kenya.