What is the main conflict in Black Elk Speaks by John Neihardt?

Black Elk Speaks (1932) is the story of an Oglala Sioux medicine man who lived with his people on the Great Plains through most of the second half of the nineteenth century—an age that saw many bloody conflicts between American Indians and white soldiers and settlers. As a child, Black Elk experienced a vision that he thought would help lead his people through the hardships they were just beginning to endure. Unfortunately, Black Elk's story is ultimately one of broken dreams and unfulfilled visions. Like so many other tribes, the Oglala Sioux's traditional way of life ran counter to the American dream as envisioned by most white Americans in the nineteenth century.