Those are strong accusations, so let us back them up. Tattersall whines that prejudice, in the form of the dead hand of linear thinking , keeps his colleagues from fully endorsing his explanation of how many human races existed side by side for many years. Yet the dead hand of linear thinking still lies heavily on paleoanthropology, and even today many of my colleagues would argue that this scenario overestimates diversity. That won t happen because, new truths about the electrical properties of materials are being discovered every year, but none of the new discoveries contradict the old ones. That s because the scientific method is a reliable way to discover truth.
Truth never changes.
We just discover more of it. Evolutionary truth , on the other hand, is based on philosophy rather than science. That s why it changes all the time. It is merely a reflection of the attitudes of whoever holds the greatest position of intellectual power. Those are just some of the clippings from our human evolution file because that s what we are writing about this month.