Lesson 1
Glaucon's Challenge
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Prof. Gendler Tamar; PHIL 181: Philosophy and the Science of Human Nature; Spring 2011; YALE Open Courses: Yale University, Philosophy; http://oyc.yale.edu/philosophy/phil-181/lecture-2 Accessed 17/09/2014; License: Creative Commons BY-NC-SA;

After introducing Plato's Republic, Professor Gendler turns to the discussion of Glaucon's challenge in Book II. Glaucon challenges Socrates to defend his claim that acting justly (morally) is valuable in itself, not merely as a means to some other end (in this case, the reputation one gets from seeming just). To bolster the opposing position--that acting justly is only valuable as a means to attaining a good reputation--Glaucon sketches the thought experiment of the Ring of Gyges.

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