Absence of evidence is not evidence of absence. I have a bachelors in Anthropology with a concentration in archeology and I can tell you that the flimsiest evidence dug out of the ground will be used by an archaeologist to dream up any number of Marxist fantasies. An example would be “This burnt stick recovered from the buried but indicates that the elites often randomly burnt down the homes of the peasants.”
I decided not to pursue a career in anthropology for three reasons; it is essentially a job for pigeon-chested, trout-shouldered, socialist dweebs, the few women in the field don't shave their armpits or wash their hair often enough, and it paid for shit - it is for trust-fund babies.