If Evolutionary Psychologists were to argue that the sky is blue, Buller would surely argue that, contrary to appearances, the sky is actually plaid. This is presumably only a minor exaggeration. Buller attempts to critique the entire paradigm of Evolutionary Psychology (EP) here, attacking it with both empirical and theoretical considerations. His conclusion? Everything EP says is pretty much dead wrong. While I don't think the arguments presented warrant a complete overthrow of EP's research tradition, in certain areas Buller does convincingly challenge some standard notions of the program.
Since this is such a large work, making many major and minor points, with sometimes technical and intricate arguments, it would be impossible to "counter" each and every portion that I disagree with here. Instead, I'll limit my remarks to a more imprecise generality, which will hopefully be sufficient to give my overall impressions.
First, the empirical side of things (although Buller actually starts with the theoretical). Like the theoretical, I find his empirical critique of EP to be a mixed bag of sorts. Some of his arguments provide a refinement of, or replacement for, certain EP theories that inadequately try to explain certain data sets. This aspect of the work is exemplified when Buller looks at marriage and mating, which are both areas that I think helpful criticisms are offered. In other areas, like parenthood and some stuff about modularity, Buller tries to offer ad hoc theories to account for the data that don't seem anymore plausible than EP's own. Some of them even seem far less plausible, as if Buller is arguing against EP solely for the sake of arguing against EP. An especially large flaw (which is particularly relevant to talk of modularity) is Buller's complete lack of mention of the Baldwin Effect--like, literally, nowhere in the book does he mention it. It's such an important phenomenon, and has been dicussed by EPs to such an extent, that it almost appears like its absence was planned, rather than being a product of oversight. Finally, some of his criticisms have already been successfully answered by the psychologists themselves, so it's worth reading their responses to Buller's book.
Like I mentioned, the theoretical side of things has some good as well as some bad, too. The good is that Buller emphasizes areas of evolution, apart from selection, that EP unjustly de-emphasizes or tends to ignore. He is also largely correct in the difficulty in which EPs face in determining adaptations. And there's some criticisms that seem valid insofar as they criticze specific formulations of various EP doctrines (like massive modularity and human nature), but that could relatively easily be reformulated so as to avoid the criticism. But the bad, on the other hand, reaches its pinnacle in the final chapter--"Human Nature" (the scare quotes are Buller's own). Buller makes the (somewhat forgivable) mistake of assuming that the concept of "human nature" presupposes a theory of natural kinds of species and a sort of naive essentialism. I say the mistake is forgivable because EPs themselves have sometimes been less than stellar at formulating precise definitions of their more theoretical concepts. Nevertheless, neither a theory of natural kinds nor any kind of "essentialism" are necessary for the concept of "human nature" to be comprehensible.
EPs should really welcome this book. It illuminates all the areas in which EP may need to have better empirical backings, and it challenges some theoretical claims that deserve closer scrutiny. Some of Buller's criticisms are misplaced, sure, but it would be difficult to say that anyone with an interest in any sort of evolutionary psychology could just ignore this work.