I “BECAUSE WE ARE ALONE…” ARGUMENTS for HUMANS AS the UNIVERSE’S ONLY INTELLIGENT LIFE FORM from ANCIENT PHILOSOPHERS to TODAY’S SCIENTISTS
“BECAUSE WE ARE ALONE…” ARGUMENTS FOR HUMANS AS THE UNIVERSE’S ONLY INTELLIGENT LIFE FORM FROM ANCIENT PHILOSOPHERS TO TODAY’S SCIENTISTS by Joseph Clayton Packer B.A., University of Mary Washington, 2005 M.A., Wake Forest University, 2007 Submitted to the Graduate Faculty of Kenneth P. Dietrich School of Arts and Sciences in partial fulfillment of the requirements for the degree of Doctor of Philosophy University of Pittsburgh 2012i UNIVERSITY OF PITTSBURGH KENNETH P. DIETRICH SCHOOL OF ARTS AND SCIENCES This dissertation was presented by Joseph Clayton Packer It was defended on October 31, 2011 and approved by Philip E. Smith, Associate Professor, Department of English Barbara Warnick, Professor, Department of Communication Brent Malin, Assistant Professor, Department of Communication Dissertation Advisor: Ronald J. Zboray, Professor, Department of Communication ii Copyright © by Joseph Clayton Packer 2012 iii “BECAUSE WE ARE ALONE…” ARGUMENTS FOR HUMANS AS THE UNIVERSE’S ONLY INTELLIGENT LIFE FORM FROM ANCIENT PHILOSOPHERS TO TODAY’S SCIENTISTS Joseph Clayton Packer, PhD University of Pittsburgh, 2012 Does alien life exist? This perennial question has driven some of humanity’s oldest scientific debates, going back to the ancient Greeks. My work investigates the way individuals have rhetorically deployed speculations about the impossibility of extraterrestrial life to advance other values and beliefs. Specifically, my research traces the unity-of-the-world cosmology or “unity,” for short, meaning the belief that humans are the only intelligent life form in the universe, in contrast to the “plurality-of worlds” one, or “plurality,” which holds open the possibility of multiple intelligent life forms. The unity rhetorical cosmology connects the absence of alien life with the idea of human value and transcendental, absolute ethics.
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