We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.Source: Declaration of Independence.
All men? Self-evident? 246 years ago, those unalienable rights didn't extend to women and even less so to Blacks. Try to predict what will be considered "self-evident" rights 246 years from now. It's hard. The only thing I'm sure of is that the notions of "common sense" will appear much different to our descendants than they do to us today.