[pron]

But it's also possible that the reason that some groups are underrepresented because is because they don't like their prospects (say, in term of a welcoming work environment). Causality works both up and down the pipeline; not just up.

[GunboatDiplomat]

It's possible, but you'd have to prove it, and I think that's an uphill battle.

Further, that's not what the previous poster was saying, and not what I was addressing. They said that there's a high degree of likelihood that not reflecting the population at large is the result of bias. That, as I said, is not likely to be true.

[pron]

> That, as I said, is not likely to be true.

I think it's by far the likeliest explanation given everything we know of human societies and human history (i.e, as a general rule, almost everything is fluid). Moreover, it's the safest: if, as a result of such under-representations, certain groups have less power in society, it's unreasonable not to try to fix it. If people get sick and you don't know if the disease is curable or not, the far safer (and more ethical) assumption is that it is. Both assumptions are not symmetrical.