I don't think religion will die because it's already there from the very start, religion is like the show business industry it will never die. Religion is good for health anyway so, it will stick until the end.
Yes religion was there, i mean in the past and there we agree. But i am not sure if i understand right, what did you mean when you said religion is good for our health. How is that religion is good for our health, i know some religious people who do not support medicine and doctors because of religion. I have heard of one man who forbid transfusion of blood for his daughter, because he thought that transfusion is a sin... there are a lot of cases that religion is not very good for peoples health.