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 Heron in "The Eye of the Heron" are themes common to much of Le Guin's fiction and include the social constructions of gender, interactions between individuals from different societies, intra-actions within societies, and contact with that which is perceived as alien or other. The novel also explores different forms of social and political organization by juxtaposing pacifist anarchism with violent oligarchy. The characters' metaphorical internal journeys are reflected in literal external journeys throughout the plot. When asked, in a 1995 interview, what role the feminist movement had played in her writing, Le Guin situated "The Eye of the Heron" in the