(inspried by readings from Sloman, Wilson and Balshine, 2006, Elsevier Academic Press)
(inspired by readings from Smith and Harper, 2003, Oxford Univ. Press)
(inspired by readings from Krause and Ruxton, 2002, Oxford Univ. Press)
(many inspired by readings from Adkins-Regan, 2005, Princeton Univ. Press)
(many inspired by readings from Klimley and Ainley, 1996, Academic Press)