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172936 https://hdl.handle.net/10776/12964 2017-07-24 eng Dhein, Kelle Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia. Arizona Board of Regents open access http://creativecommons.org/licenses/by-nc-sa/3.0/ In 'Altruism and the Origin of the Worker Caste,' Bert Hölldobler and Edward Osborne Wilson explore the evolutionary origins of worker ants. 'Altruism and the Origin of the Worker Caste' is the fourth chapter of Hölldobler and Wilson's book, The Ants, which was published by The Belknap Press of Harvard University in Cambridge, Massachusetts, in 1990. In 'Altruism and the Origin of the Worker Caste,' Hölldobler and Wilson evaluate various explanations for how a non-reproductive caste of ant evolved. Their investigation into the evolutionary origins of worker ants synthesized research on the reproductive practices of ants to provide an analysis of how sterile groups of organisms persist in a population. Literature Ants Insect societies Kin selection (Evolution) Evolution Altruism Publications Wilson, Edward O. Hölldobler, Bert, 1936- "Altruism and the Origin of the Worker Caste" from The Ants (1990), by Bert Hölldobler and Edward Osborne Wilson