dhw: Why are some people so reluctant to accept that if we are all descended from common ancestors, we might also have many features in common, including the positive ones we would like to claim as our exclusive propertyIf we manifest the same behaviour and we share the same brain cells, what grounds can there be for doubting ... as many humans do ... that we share the same feelings?-The following has one moral. Play only with satiated cheetahs:-http://www.dailymail.co.uk/news/article-1246886/Pictured-Three-cheetahs-spare-tiny-antelopes-life--play-instead.html