Retrieved 2018-01-24. ↑ "The Evolution of Social Complexity | School of Anthropology & Museum Ethnography". www.anthro.ox.ac.uk. Retrieved 2018-01-24. ↑ "Episode #24 - Bryson on Why Robots Should Be Slaves". philosophicaldisquisitions.blogspot.co.uk. Retrieved 2018-01-24. ↑ Close engagements with artificial companions : key social, psychological, ethical and design issues.