I hope all of you saw Bruce’s brilliant post on this topic.  Excerpt:

There are two prominent kinds of anti-evolutionist in public life – and by which I mean people who deny the applicability of evolution by natural selection to some aspect of humans

…

…it turns out that the much demonised and despised religious anti-evolutionists who are skeptical about macro-evolution of humans are in plain fact much more scientific and empirical than are those numerous and influential secular Leftists who challenge the solid, and indeed observable, reality of human adaptation or micro-evolution.

The religious anti-macro-evolutionists who acknowledge within-form adaption are indeed within the historical mainstream of biology in their focus upon form as primary; the secular Leftist anti-adaptationists are chucking-out biology altogether in favour of a political ideology which ignores the most basic level of reality-testing.

Since it is secular Leftists who control public discourse we find public discourse in the extraordinary, and scientifically indefensible, position of asserting that on the one hand macro-evolution is necessarily real and the essential form of the human species certainly arose by natural selection – which is an incremental accumulation of adaptive changes; yet on the other hand denying that micro-evolution, adaptation, has occurred within the human species.

In other words, the speculative and uncertain aspect of Darwinian natural selection is accepted as necessary, as dogma (to reject which is to move outwith the bounds of legitimate public discourse); while the empirically and experientially verifiable aspect of Darwinism is at the same time rejected.

Secular Leftists thus believe in speciation but not adaptation; they believe that humans arose by natural selection, but also that – once humans had arisen – natural selection does not apply to humans!

Before reading this article, I hadn’t quite realized just how ridiculous the Leftist line on human evolution actually is.  Of course, this says nothing about what our position should be.  I believe that speciation by natural selection is compatible with a realist position on forms (because essentialism just requires the existence of sharp boundaries, not that they can’t be crossed between generations), but greater philosophical minds of the Thomist school are known to disagree (because supposedly an effect can’t have something lacking in its cause–see here for an explanation of this disputed principle).  Unlike the Leftists, we have no reason to deny the obvious differences between the human races.