Terence Tao is the oldest brother. But of course that doesn’t matter. One could equally hypothesize being the oldest allows for most attention from the parents

Terence Tao is the oldest brother. But of course that doesn’t matter. One could equally hypothesize being the oldest allows for most attention from the parents, etc. But then again, Judit Polgar, by far the strongest chess player among the famous 3 Polgar sisters, was the youngest… In my opinion, this sort of “human peak” genius performance requires more than small differences in upbringing.