Things can go wrong in thousands of ways , but they go right in only one . Me paraphrasing some guy whose name and function I forgot and now can ' t google it to find it out <| sep |> I disagree completely . Morals have always been the same . The Mayans and the few others that had a different understanding of human sacrifice stand out precisely because they were so different . Murder is killing without a just reason . Societies have had timely understanding of what causes were just , but there have been few or no societies which did not agree that you can ' t just kill anyone you get a notion to kill without cause . The essential element of murder is the without just cause but . The causes which are considered just are the accidentals . But all this evades the critical element of the conversation . I claimed that you were pointing out what is popular , not what is objectively right or wrong . A god is required to be the grounds for a moral law , which is the basis of a right . Edit added summary .