It's that simple. I'm sorry to say. Opposing what's in that book is why we're here. We cannot have the will and strength for real goodness on Earth without faith in another life. If with our scientific thoughts we kill the idea of God in our minds, we have begun the process for our own self destruction.
Life creates life.
Only misdirected consciousness creates willful death in another being viciously. There must be misdirected consciousness for that to occur. There cannot be human misdirected consciousness where God is actually always remembered and served. That would be impossible. Because, in such a place of humans, there is NO UNwanted progeny, so everyone is raised properly.