The teachings with the Course are non-dualistic teachings. For those who go back into historic China or back into India, you would've heard about Advaita Vedanta. Advaita in fact suggests “not two,” and that is a method of referring to the fact that there's a oneness which connects us all. https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw