Who is Levy-Bruhl from Memories, Dreams, Reflections and what is their importance?

Levy-Bruhl is the name of a European thinker who turns up intermittently throughout the book. He had ideas that pollinated Jung's work. In the final chapter he refers to "collective representations", which instantly relate to both symbolism as in language and other signs but can also lead into articles of the unconscious. Road signs and cars could be archetypes five hundred years from now as knights are nowadays.