Plato's Gorgias: Amoralism (part 3 of 3, Callicles section)
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In the final act of Plato's Gorgias, Callicles "presents himself as a no-holds-barred, bare-knuckled, clear-headed advocate of Realpolitik" arguing the amoralist position that it is natural for the strong to dominate and that it is unfair for the weak to resist by establishing laws. For Callicles, institutions and moral codes are established by those who are naturally looking after only their own interests.
The section begins with a devastating and unforgettable screed against the pursuits of philosophy and is considered the earliest precursor to the ideas of Friedrich Nietzsche.
We will focus on the final Callicles section of the Gorgias. If you've not read this dialogue before you might want to read from the beginning (Socrates' conversations with Gorgias and Polus), but this is unnecessary for our discussion.
Text: http://www.gutenberg.org/files/1672/1672-h/1672-h.htm#link2H_4_0002