The interesting thing about the Greeks is that they view themselves one way, but their actual behaviors tend to be another way. Take the case of the Athenians. People living in Athens actually fell into three distinct classes. There is the nobility; and there are the free people; and then there are the slaves.
If you have ever studied classical Greek mythology and Greek society, in particular, this information would probably have escaped you because you would be taken in by all these amazing philosophies as well as amazing intellectual work. However, that intellectual body of work requires funding. People can’t just normally drop everything and simply write philosophy. Somebody has to pay for that, and this is where the slave society comes in.