Even though Jesus is the Son of God, he still has a greater knowledge and a wisdom far more valuable than us. He died to safe us, but I don't think that he would die to see the world in shambles in 2008. Any exceptions? Maybe. They say that even a murdered can go to heaven. All you have to do is believe. To go to heaven, you have to have a journey, not only restricted to physical one, but more importantly, an intellectual, inner and emotional journey. What you learn, do, realize and subsequently believe in will alter the views of the made up reality around us. And if you're lucky enough, you'll be embraced.
What I'm trying is that a long bearded person, wearing torn clothes and wandering through the world, full of wisdom and equally number of questions in his head is more likely to go to "heaven" than Al Gore.
They invented it because they were scared and greedy