"...when 600 clergy...and a Repudiation of the Doctrine of Discovery."

The clergy mean well, but the "Doctrine of Discovery" is written into American law, and as you note, 2BePeace, is still invoked and CITED to trump Native American claims to United States land. Indeed, it is alive and well, legally, and is a cornerstone to and fundamental basis for deciding ancient and modern land rights in the US. It is one papal document that the US has absorbed and modified in its legal guts. Historically, it became THE sacred text for English colonists (and later American expansionists/today's secularists), many of whom, ironically, were devout Protestants. Their white, Anglo consciences, founded on scriptural religion, upheld it. Anyway, the Standing Rock plaintiffs and defendants in a future Court case will be like two parties ducking their heads in a bucket of acidic water, with each daring the other to remain longest under it. It is SO foundational to grasping the legal origins of the US!