If I might paraphrase a well known figure on this website: 'If don't have any expectations you can't be dissapointed, only pleasently surprised.' That's the best way I can describe my lack of faith in humanity, that's not the reason for it mind you, just the way I view things. I admit though, I am getting pretty sick of threads where the author has given up on our species because of petty inconveniences in their social life. Really it's just the title, if they didn't equate the magnitude of the situation to something that has had some perennial altercation to their worldview, people wouldn't be as bothered. I also think people are to easy to confuse 'lack of faith' with 'pure unabated animosity', when really to me a lack of faith is just a signal of mistrust. I don't immediately loathe every person I come into contact with, I just have no expectations and play the cards I'm dealt with. And really, I don't need to have any faith in the 8 billion people that populate this planet, I know at least 100 people who I consider to be good and respectable, that's enough for me. As long as I can find a handful of people who's company I enjoy, it really doesn't matter if everyone else surrounding us is an asshole.
Tl; DR 'If don't have any expectations you can't be dissapointed, only pleasently surprised.'