the social systems adjust to the facts on the ground the facts on the ground don't adjust to the social systems the next Marx will come up with a theory that

the social systems adjust to the facts on the ground the facts on the ground don't adjust to the social systems the next Marx will come up with a theory that fits the facts, and if it makes enough sense to the people on the ground, it'll gain steam and political momentum, and then there will be a new social system in place