Heaven? Where Did you Get that Idea?

Surveys have shown that most people in the western world believe in the idea of heaven - but where did the idea come from? Many who believe in heaven don't know the answer to that, which suggests to the sceptic that the concept of heaven is nothing more than wishful thinking. Did the idea of heaven develop through near death experiences? Is there some consensus from the different world religions? '...I've seen better. Some of the grammar and punctuation was quite poor. Where did this guy go...