http://www.radiolab.org/story/91696-new-nice/ http://www.radiolab.org/story/91696-new-nice/ This episode of radiolab goes into some theories about the process

http://www.radiolab.org/story/91696-new-nice/ http://www.radiolab.org/story/91696-new-nice/ This episode of radiolab goes into some theories about the process of fox domestication and hypothesizes that something similar might have occurred in humans. I don't remember it in enough detail to summarize, but it's a fascinating listen.