This movie explains that the Earth was destroyed because of wars of religion and that therefore the survivors destroyed every religious books to prevent from repeating the same disaster. And yet, one man – Eli played by Denzel Washington – who's supposed to be a good man, a wise man chooses to preserve one of these religious books which was partly responsible for almost destroying the Earth!! What's the idea? He expects this time the job will be done correctly and Earth and mankind will be destroyed completely? The Hughes brothers are trying to say that religions are a good thing that can be bad if used by the wrong people (Gary Oldman's character). Which is a stupid message. The good question is: do we need religion to live together? The answer is no because as soon as someone has one religion he rejects anyone having another religion (or no religion at all). Religious tolerance is a myth, it does not exist. Man has invented something better than religions to live together, it's called Laic Democracy. One more thing, Eli hears voices (like Joan of Arc) telling him what to do and the Hughes brothers, who obviously believe in God, implicitly assert that God exists by this subterfuge (since "He speaks to Eli"). Didn't the Hughes brothers ever heard of medical science? Someone who hears voices from God (or anyone else) is not a Saint it's someone who suffers from schizophrenia (a chronic, severe, and disabling brain disorder). By the way, religions do exist, it's a fact. And God does not exist, it's a fact.
Review of The Book of Eli
