Humans are born with a hard-wired morality: a sense of good and evil is bred in the bone. I know this claim might sound outlandish, but it's supported now by research in several laboratories.
A sympathetic parent might see the spark of consciousness in a baby's large eyes and eagerly accept the popular claim that babies are wonderful learners, but it is hard to avoid the impression that they begin as ignorant as bread loaves.
Any simple claim that you need religion to be good is flat wrong.