I've started revamping my Intro to Philosophy syllabus and have decided to tackle the inevitable discussion of relativism and psychological egoism early on by anticipating these objections with some readings.
I thought about using chapters from Snare's The Nature of Moral Thinking but a friend who used Snare in her class said that students found it difficult. I've tentatively settled on Rachels "The Challenge of Cultural Relativism," which appears in many anthologies, and perhaps also his "Humans are not Always Selfish". Someone recommended that I look at chapters from Shafer-Landau Whatever Happened to Good and Evil?
Any other recommendations or thoughts about the aforementioned possibilities?