i'm afraid you are talking nonsense
you need no hx of running in any country to be great
this is not a sport which requires any special gymnastic/technical ability to excel - just running talent + hard work
in '80s there were the djibouti M runners, abdi bile of somalia & matete of zambia & now montsho of botswana
all world-beaters with no hx of running in their country
tradition is a nonsense concept
as for dopers from eastern bloc, whoever they were, they still ran only 3'52/3'53+ - if they were dopers from getgo, this only indicates they were poor intrinisic 1500 talents, probably 4'00++ without drugs
i have little doubt if the top africans seriously doped, they woud be <3'50 & if say, the top american gals did, i'd see them going 3'50 - 3'52
the chinese were talented & yes, a case can be made for doping, as we do see 3'30 guys dope to get there ( my = 3'50 ) & they may have been more like 3'55+ without doping
however, like i said 4'00 is a shit time compared to men & 3'50 = 3'30 & men have run 3'30 without dope - cram/maree definitiely were clean in mid-'80s, & i believe women can run 3'50 without dope - maybe chinese did, maybe they didn't, but it's possible