One thing that I find interesting is that in our culture, we have an accusation that gets flung around a great deal both on the national stage (generally, journalists accusing politicians, or each other) and in interpersonal relationships "down here."
That accusation is that of "cynicism."
What's interesting and even humorous is that I'd bet if you polled 100 people who regularly use the word, very few (single digits would be my guess) could give a particularly useful or informed definition of the word.
I say that not at all as a "people are stupid" sort of observation - indeed, what prompted this post was that I read an article that contained an accusation of cynicism and I wondered "what does that actually mean?" I had to look it up on Wikipedia.
Equally interesting is the stuff about the Greek philosophical school called "the Cynics." Read about it, but remember that often modern history tends to record information about philosophical schools that reflects degenerated forms that came after the original teacher's school had disbanded.