Without these two things there is no reason for people to not behave has ISIS does, there's no reason for people not to just rape and pillage all over because this is the only life they get, so why live by any standards? Why not TAKE what you want?
So your entire sense of morality is dependent on what the Bible says?
I dunno, the Bible seems to paint rapists and pillagers in a pretty favorable light, so long as they have the "God told me to do it" excuse....
Answering the question a little less snarkily, "why not take what you want?", the answer is that experience has shown that by living in a socially responsible and ethical manner, the living standards of all in the community are raised. Billions of people all over the earth, past and present, have figured that out without even having heard of the Bible, much less read it.