I probably did not pay enough attention to your emphasis on evolutionary biology. My own view is that there is a lot we do not know about the development of the evolution of consciousness. I believe that the ancient thinkers thought in a very different way to the way we do. I am influenced by Julian Jayne's , 'The Origins of the Bicameral Mind' and its emphasis on human beings not having the same division of outer and inner reality which we have. I am sure that problem solving was extremely important, but I do believe that the picture of early human beings as primitive may be misleading. I am thinking of such sophisticated culture as in ancient Egypt. and Greece.
I can see that the collective unconscious is difficult to see as a scientific theory, if we stick to the physical sciences alone. I believe that the social sciences are also useful, but it is here that it gets more complex, especially in the realm of psychology because the premises of the theories involve specific assumptions and interpretations. Jung's idea of the collective unconscious and the idea of archetypes can be seen as related to the idea of Forms of Plato and ideas such as Hermeticism, and other esoteric systems of thought on one hand, but on the other, Jung did suggest that the collective unconscious was not an aspect of nature.