Vine Deloria Jr. is a true scholar who characteristically approaches his subject with thorough research and disciplined reasoning. Applying geology and precise logic Deloria uncovers some major flaws in the Bering Strait theory. He also points to the fascinating fact that oral histories and legends of Indian nations carry pre-historic events such as major geologic upheavals. In this way, he makes the important point that oral histories should on no account be dismissed. On the other hand, he shows how flawed scientific theories are supported when powerful academics will shut out any new facts or alternate theories just to hold on to their pre-eminence. Even worse, Deloria cites cases where those who dared challenge the authorized theory, can have their careers destroyed. After finding medical pronouncements which contradict each other - ie. margarine is good for you; margarine is bad for you, etc. - it is clear that "science" is an exploratory discipline and that final pronouncements or theories should only be given qualified consideration until all the facts and information are in. This should be kept in mind with the recent speculations regarding the "caucasian" skeletons that have been found on this continent. The political dimensions of "science" are glaringly apparent where some, including scientists, leap to conclusions and use science as a tool for further dispossession of the indigenous nations of the western hemipshere.