>>13809557The same reasoning could be applied to any form of evolutionary theory.
The fact of the matter is that human behavior has been shaped by evolution, and the same applies to the behavior of any other organism. We can't go back in time and directly observe what happened in the past, but there is still loads of fossil evidence and material culture that ancient humans and earlier hominids have left behind. Genetic anthropology is also becoming increasingly accurate, and we are getting to the point where we can trace the evolutionary history of at least some metabolic, endocrine, biochemical, and neuorological processes. What I mean by that, is that we are getting to the point where we can directly measure, using fossil evidence and DNA sequencing, how humans became better, e.g. at digesting and metabolizing substances ranging from food to drugs, and many other things, and we can see how the genetic markers associated with these neurological, digestive, etc. adaptations have changed in frequency in response to environmental pressures that have been present in ancestral human environments up until today. We can even quantify rather precisely how allelic frequency responds to environmental selection. This means, for example, that within the next few years, we will be able to start making precise statements, supported by both fossil evidence and mathematical biology, about things like how lactose tolerance develops in human populations, and how changes in the frequency of lactase persistence are mathematically correlated with historical changes in prevalence of dairy farming.
Also, even without all of the opportunities created by modern genomics and evolutionary genetics, we can still make at least some precise claims concerning evolutionary psychology. I am specifically thinking about the evolutionary consequences of multilevel selection and evolutionary stability, and how this would be related to the sociological development of hominids across time.
