I cannot imagine doing this today, although there are still places that need a secret university. However, I wonder if we have the solution, at much less risk. I wonder if, 30 years from now when a whole new generation has grown up, we will discuss poor countries (or, say, people under the Taliban, or in North Korea) learning from the Khan Academy, Coursera and the like in the same way. "What was it like, mom?" "Well…
Unlikely. Those people don't have the luxury of time needed to put any serious efforts towards their education.
Not only that, but physical activity plus our mental strain screws with our cortisol levels.
Personally, I used to work out a lot. Then I realized I was getting crabby all the time. I think I have cortisol problems, but not sure.
Anybody refer me to research with stress and and physical workouts and not getting enough sleep?