Here's a little write-up I put together for you all. I think Holla Forums has been lacking in philosophical and intellectual discussion for a while, so I decided to finally put this theory I've been toying with into a (relatively) concise set of words. I hope this helps provide a new perspective or perhaps build on knowledge you already have. Critique and argument is, as always, welcome.
The Theory of Materialistic Morality and a Case for Morally Justifiable Racism
All living things are the product of evolution, including humans. If there is one universally definable purpose of all living things, at least from a purely materialistic and evolutionary perspective, that fundamental purpose is reproduction and survival. If all all living things are a product of evolution, then we can deduce that the behavioural tendencies of all living things must also be determined by evolution. Therefore all behavioural tendencies, which are a product of evolution, must serve the fundamental evolutionary purpose of reproduction and survival.
The definition of morality is “principles concerning the distinction between right and wrong or good and bad behaviour.” If human behavioural tendencies are the product of the fundamental evolutionary purpose of reproduction and survival, then morality, which distinguishes between “good” and “bad” behaviour, must also be a product of evolution, and serve to define behaviour that either aids in this fundamental evolutionary purpose (good), or opposes this fundamental evolutionary purpose (bad). For example, stealing and murder are considered across ethnic and racial groups to be morally “wrong” acts, since they reduce trust and cohesion within a population, which weakens it internally, thus threatening its ability to propatavistock and survive. A socially weak and untrustworthy population would be unable to effectively prepare against external human threats such as attacks from other tribes/out-groups, or natural threats such as an unusually harsh winter or limited access to food. We can thus logically conclude that evolution has favoured behaviour that ensures maximum cohesiveness and co-operation within an in-group, which has over-time morphed into a set of moral values.
Human evolution has resulted in biological divergence, which in turn has resulted in the existence of different subspecies of humans (distinct human races). Human populations from these different subspecies are naturally tribal in nature, meaning they are inherently exclusionary to those not belonging to their own biological & ethnological in-group. In this way, human morality can be considered both “subjective” and “objective” at the same time. It is “subjective” in that morally good acts are not universally applicable across all racial and ethnic populations, but instead only apply to one population at a time, and it is “objective” in that it has been deduced from evolution and can be materially defined (that is to say it can be defined within the parameters of the material world without relying on metaphysical concepts or ideas). For example, in a conflict between population group “A” and population group “B”, a morally “good” act from the perspective of population group “A” could involve the wholesale extermination of population group “B”, since doing so would ensure their survival, even though the act of murder is considered morally wrong within the context of each society respectively. This theory accurately explains why different human groups have warred with and committed genocide against each other for thousands of years despite “murder” universally being considered morally wrong and punishable in every society.