No, he wasn’t doing 100 miles per week his first year of running. He went from 5:38 as a freshman to 4:07 as a sophomore on what was then around 50-70 miles per week depending on the season at East (xc vs track). Is that good enough “baseline at a young age” for your qualification? Ryun ran under 4 minutes in crap spikes beating the Olympic champion and world record holder after only TWO years of running. He didn’t start consistent 100 mpw until the summer after his junior year when he moved in with Coach Timmons and his wife on the farm. You have to understand that the training was based on swimming workouts- this is all his coach knew- massive volumes of 2’s and 4’s with short recovery. I would encourage you to read “The Jim Ryun Story” for some baseline education on the matter.
I’m not sure where you get “much of the world not participating in the sport”, but that’s clearly a new one. It’s the oldest sport out there and was extremely popular in the 60’s. The Kenyans and Ethiopians were deadly even in those days- Wolde, Bikila, Temu, Keino, etc There were the Czechs (odlozil), the Aussies (Clarke), and the Kiwis (Snell, Davies). There were outliers then as there are today- from Belgium…from Tunisia…point being, the whole world was represented.
Besides, how would that false narrative refute a young man’s talent? Look, I’m not trying to be a @$hole here, but I can’t stand false narratives based on lack of knowledge on a subject. You’re young- I get it. You’re enamored with the performance of Kessler- I also get that. What Kessler has done is incredible; but what Ryun did was other worldly. Imagine if Kessler kicked down Cheruiyot on Saturday, but was a high schooler? That is what I think you’re not grasping.