When a significant number of people think that killing someone for blasphemy is a just thing to do?   when a significant number of people a few centuries back thought that humans could be property?    I&#x27;d compare this to finding a civilization that used the word &quot;tree&quot; to refer to Volkswagens.      Yeah, I&#x27;m going to say that there isn&#x27;t a meaningful agreement on ethics or morals across culture and time.<p>This idea of an external set of ethics; an external morality that is &quot;right&quot; regardless of human opinion <i>is</i> a universal-ish  concept, as far as I can tell, it&#x27;s agreement on what those universal ethics are where there is disagreement.