The teachings on the Course are non-dualistic teachings. For those who go back into historical China or back into India, you would have heard about Advaita Vedanta. Advaita actually suggests “not two,” and that's a technique for talking about The actual fact that there's a oneness which connects us all. https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw