Okay, how about a set of non-religious rules of ethics, or at least something all major religious groups can agree upon?
Don't steal, don't lie, don't murder/use violence, don't make any unwanted sexual advances, those seem general enough that everyone should be able to agree, no?
Oh in that case, why ever try to improve anything? History shows us some asshole is just gonna come along and mess it up anyways. Perhaps the founding fathers should have just paid their stupid tea tax and stayed subject to the British crown.