The teachings from the Course are non-dualistic teachings. In case you go back into ancient China or again into India, you would've heard about Advaita Vedanta. Advaita basically indicates “not two,” and that is a method of discussing the fact that there's a oneness which connects us all. ACOL alone https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw