Christopher Hitchens is easily the best writer on this topic that I’ve encountered. If you think he’s sharp and witty in his YouTube debates, you should see him in print!
There’s no way I can sum up this book and do it justice. Check out some of the quotes I pulled below (I’ll leave one more in here), and read the book for yourself.
It is an honest and shocking look at religion over humanity’s history.
“If I cannot definitively prove that the usefulness of religion is in the past, and that its foundational books are transparent fables, and that it is a man-made imposition, and that it has been an enemy of science and inquiry, and that it has subsided largely on lies and fears, and been the accomplice of ignorance and guilt as well as of slavery, genocide, racism, and tyranny, I can most certainly claim that religion is now fully aware of these criticisms. It is also fully aware of the ever-mounting evidence, concerning the origins of the cosmos and the origin of species, which consign it to marginality if not to irrelevance.”