http://www.nextnature.net/2011/02/we...ted-ourselves/
Neoteny is an old theory for some aspects of human development. It is noticeable that human adults have many features similar to the young of other primates, including larger eyes, flatter face, smaller fangs etc. An associated theory is that this is a result of self selection. Humans have, according to this idea, many of the characteristics of domesticated animals. We are less aggressive than wild animals, and have more of the 'clingy' nature of the young. Have we become what we are by preferentially associating with, and mating with 'tamer' humans?