[KaoruAoiShiho]

Why specifically Einstein... 5000 cushy people isn't likely to produce an Einstein but could easily produce some great artist or engineer or other researcher.

Anyway about Einstein you need to think about how many physicists existed at his time that had the education to even work on a theory of relativity. It's probably about 5 thousand. Think about it in terms of sports, someone who is a 1 in 5000 talent probably wouldn't even make it onto a college sports team, but that's because sports is something we as a society support tremendously. Someone like Michael Jordan is 1 out of 10 million, cut down the overall population to 5000 and it's like celebrating the "genius" of a district middle school star.