With this one, I can agree that our body has most of the answers to questions about our actions. However, some of these causes do not necessarily have to be related to our chemical makeup. There may be cases where the causes are not chemical and simply correspond to our nature. For example, there is no chemical explanation for homosexuality. Charles Murray, in his book The Bell Curve, "argues not only that intelligence is genetically hereditary, but also that there are racial and ethnic differences that explain why whites are better off socio-economically than blacks ". However, even though intelligence can be hereditary, this does not mean that intelligence cannot be developed, we are all more or less intelligent, but it depends on how much is developed to put it to good use.