Kind of doubt I'll get many takers on this but NYTimes has a good article on Zeus and whether he existed or not.
http://opinionator.blogs.nytimes.com/2013/07/31/did-zeus-exist/?hp
It sounds crazy, but what he discusses is why fairly intelligent greeks at the time, who demanded quite a bit of evidence, still considered the greek gods to be real, etc.
I'd not seen this type of discussion before. Of course, I've never met a person who thought Zeus was real either.