Cooperative eye hypothesis Cooperative eye hypothesis The cooperative eye hypothesis is a proposed explanation for the appearance of the human eye. It suggests that the eye's distinctive visible characteristics evolved to make it easier for humans to follow another's gaze while communicating or while working together on tasks. Unlike other primates, human beings have eyes with a distinct colour contrast between the white sclera, the coloured iris, and the black pupil. This is due to a lack of pigment in the sclera. Other primates have pigmented sclerae that are brown or dark in colour. There is also a higher contrast between human skin,
The Eye of the Sibyl his "Exegesis", and later the novels "VALIS", the posthumously published precursor to VALIS, "Radio Free Albemuth", and "The Divine Invasion". Eventually rejected by the venue for which it was written, the major points of Dick's 1975 worldview are set forth, in a style reminiscent of his earlier work, and very similar to his treatment of this material in his later books. The Eye of the Sibyl "The Eye of the Sibyl" is a science fiction short story by American writer Philip K. Dick. It was written sometime around 1975, but not published until 1987 when it was included in volume