I actually haven't; I've listened to interviews with Kevin MacDonald, though. My feeling is that evolutionary explanations of behavior are always somewhat ad-hoc, and while they may be a good guess they are not easily proved, and as such are easily dismissed by social constructivist scholars (whose own assumptions are even more farcical but have the distinction of being the null hypothesis of left-biased science). Great that it's published online though, I wasn't actually aware of this, so thanks.