It would be a different matter, of course, if humans had immaterial minds, but there is very strong empirical evidence against that view, including such things as the effects of a blow to the head and brain damage of different sorts, the effects of diseases such as Alzheimer’s, the decline of mental capacities with aging, the relations between the mental development of children and the growth of neural circuitry, the inheritance of personality traits, the different correlations in the case of identical twins versus fraternal twins with regard to such traits as intelligence, the effects of psychotropic drugs, such as Prozac, and so on (Tooley, 2012, 42–4).