If there is no higher power, why should we conduct ourselves in a civil manner? There is no one to answer to.
Morality without a higher power is useless to me. What is good or bad? Man made revelations if nothing else.
Rape, pillage, cheat on your taxes etc etc if there is no grand accountability.
Most people that commit crimes are god believing, the stats in prisons back it up. What stops others is the consequences of breaking laws. The rest are genuinely good and know it's self evident, they wouldn't want it done to themselves.
Maybe some people need a god to behave themselves. But then what does that really say about yourself, that you're inherently evil? If so, why would a god want to associate with you in the first place? I think we are better than that.