If you want to increase diversity of thought, you'd be better off recruiting from schools other than Stanford and the ivys.
Contrary to what my overly succinct comment may have suggested, I think that diversity initiatives are critical, both for a society and a company. Companies need to stay vigilant for potential sources of bias in hiring and retention and deal with issues aggressively when identified.
My comment about proponents of diversity wasn't intended to malign everyone who recognizes the importance of diversity initiatives (which as I said, includes myself), but rather, a particular philosophical strain that I've encountered as the dominant force amongst diversity initiatives in the companies I've experienced (including within the "big 4").
What frustrates me specifically is precisely what I mentioned: an often unqualified rejection of rational consideration of facts when they even resemble an unpalatable conclusion. In the example we're talking about: there are less women than men in company X. Either the company is discriminating, women are somehow innately less suited to work there, or there's upstream discrimination so that hiring reflects an equal assessment of the candidate pool. The evidence pointed strongly to the latter situation (ie the proportion of women cs majors was equal to the proportion of women technical employees, and non technical employees broke down 50/50).
And yet, any suggestion that the company wasn't explicitly discriminating (and that the problem existed upstream) was shouted down with "If you think we're not discriminating then you must think women are innately unsuitable and will be reported to HR for creating an unwelcome misogynist work environment"[1].
So when I talk about proponents of diversity lacking rigor, it was shorthand for "IME, in places that are quite reasonably considered the mainstream, the prevailing school of thought with respect to diversity initiatives focuses more on appearances and social signaling than actual progress".
[1] note that I was smart enough to stay out of these conversations so I wasn't ever actually the victim of this sort of lunacy.
Will seems like a very strong claim to make. Can, certainly, but will? Maybe it all depends on what kind of sample size you have in mind.
Your project's total addressable market probably includes a diverse population of people. Meanwhile, the decisions in your project are made by the folks involved in it -- maybe some PMs, hopefully some UX and design engineers, and probably some programmers. I believe that our opinions are informed in part by our environment -- as someone living in California, I come up with California-oriented solutions to problems a bit more easily than ones suited to other locations. (I think this is why Dark Sky came from a team in New York, for example.)
So, I conclude that a diverse team will come up with ideas that are broader, and as a result, solutions that help more people, than would a less-diverse team.