The horse to back is the horse that goes.
As a going concern, however, anthropology, as part of evolutionary biology, is a history of vital tendencies which are not natural in the sense of merely physical.
What are the functions of philosophy as contrasted with science?
Two.
Firstly, it must be critical.

It must police the city of the sciences, preventing them from interfering with each other's rights and free development.

Co-operation by all means, as, for instance, between anthropology and biology.

But no jumping other folks' claims and laying down the law for all; as, for instance, when physics would impose the kind of method applicable to machines on the sciences of evolving life.
Secondly, philosophy must be synthetic.

It must put all the ways of knowing together, and likewise put these in their entirety together with all the ways of feeling and acting; so that there may result a theory of reality and of the good life, in that organic interdependence of the two which our very effort to put things together presupposes as its object.
What, then, are to be the relations between anthropology and philosophy?
On the one hand, the question whether anthropology can help philosophy need not concern us here.