<p>You do realize that aside from the sheer randomness of your list (though heavily science biased), not a single one of the 5 people you list received an undergrad degree from Princeton. 2 of them did not receive any degree from Princeton, and one of them never was affiliated with the University (Albert Einstein was at the Institute for Advanced Study, which has no official affiliation with Princeton).
So even if you assumed that the affiliations of 5 random brilliant people (there’s absolutely no reason to call them “the smartest people in the world” - one of them is dead, why does he count? All of them are randomly selected) had any relevance to what university is best, note that none of them were Princeton undergrads, so it provides absolutely no evidence that being an undergrad at Princeton has any special correlation with genius.
Incidentally, the list of where the 5 actually did their undergrad degree is Oxford, Brandeis, ETH Zurich, Flinders University, and Carnegie Mellon.</p>