Owen Barfield thought that you could trace the evolution of consciousness through the history of language and made the argument in the book "History in English Words": "In our language alone, not to speak of its many companions, the past history of humanity is spread out in an imperishable map, just as the history of the mineral earth lies embedded in the layers of its outer crust.... Language has preserved for us the inner, living history of our soul. It reveals the evolution of consciousness"