Between the Species

Between the Species online journal logoAn online philosophy journal about the relationship between humans and animals.
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Ethics Group

Cal Poly's Ethics + Emerging Sciences Group focuses on the implications and impact of emerging sciences and technologies.
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Charles T. Hagen

Professor Emeritus

Contact Information


  • Ph.D., MA, University of Michigan (1981)
  • B.A., Harvard
  • B.A., University of Washington


  • Greek Philosophy
  • Medieval Philosophy
  • Locke

Selected Publications

  • Simplicius: “On Aristotle Physics,” (translation and commentary), Cornell University Press, 1994.
  • “The Energeia-Kinesis Distinction and Aristotle's Conception of Praxis,” Journal of the History of Philosophy 22(1984): 263-280.
  • “Rationality in Plato's Republic,” Philosophy Research Archives 11 (1985): 611-634
  • Review of John J. Keaney, The Composition of Aristotle's Athenaion PoliteiaAncient Philosophy XV(1995): 263-268


  • Philosophy Minor Advisor

Courses Taught

  • PHIL 312: Medieval Philosophy
  • PHIL 311: Greek Philosophy
  • PHIL 231: Philosophical Classics - Ethics & Political Philosophy

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