First, a disclaimer -- I'm a scientist first and foremost, so I'm a little rusty on the subtle differences between some defined schools of thought. Being insatiably curious, though, I'm going to give armchair philosophy a try.http://encyclopedia.thefreedictionary.com/Objectivist%20philosophy wrote:Objectivism rejects the mind-body dichotomy, holding that the mind and body are an integrated whole, neither one of which can exist without the other, and neither of which can be interchanged between persons. Objectivism therefore rejects not only theism and idealism but also materialism, as well as any value judgment that is based upon a dichotomy between mind and body. Objectivism does not propose or favor any particular metaphysical or scientific explanation of the relationship between mind and body. (emphasis added)
I've always considered myself a materialist/naturalist, and was surprised to read the above when I did some research on objectivism. I was nodding and agreeing with most of what I'd read until the phrase about rejecting materialism.
Given that materialism holds the position that mental events can be exclusively reduced to physical causes and effects, it seems to agree with the rejection of a mind/body dichotomy. In the trio of philosophies I emphasized in the above quote, I can't find much in common between materialism and theism or idealism. From what I see, the implication is that materialism is being rejected for similar reasons -- and yet materialism holds relevant beliefs that are polar opposites of the other two.
Perhaps the answer is in the last sentence. The only explanation I can see is that objectivism rejects materialism because the latter makes a claim that goes one step beyond the tenets of the former: Objectivism doesn't favor any particular explanation of the connection between the mind and the body, while materialism does. But that's sort of like saying a Catholic is not a theist because he goes one step further in defining the nature of God. But regardless, I disagree with this last point: Objectivism rejects the idea of a mind/body dichotomy -- that, to me, is indeed favoring a metaphysical/scientific explanation of the mind/body relationship, in that they are, effectively, one and the same.