"Humans have always been the same" It may be true that modern life (be it Industrial age or Information age for your demarcation) is evolutionarily short, reme

"Humans have always been the same" It may be true that modern life (be it Industrial age or Information age for your demarcation) is evolutionarily short, remember that the rules of environmentally-triggered gene expression can effectively result in "evolved behavior" faster than actual mutation gathering. If gene expression is adaptable to social conditions, and social conditions produce the same pattern of gene expression across generations, then the functional organisms: shape, weight, aggressiveness, psychology produced by the pattern of gene expression WILL change on a large scale. So you could do psychological/anthropological behavioral studies for "modern" humans in "modern" life, if they aren't doing cross-cultural comparisons, and "universal psychological truths" won't be universal. The big question to me personally is if you have sustained centuries of, let's say, "capitalism-based selection", how much drift is there? Capitalism undeniably rewards certain sociopathic traits that really are only applicable to modern times: plenty of resources, availability of technology, etc. We're probably at the tail end of a long run of "plenty".