But culturally, there are many big examples where that's exactly what happenened over time: things that are initially considered "just fine" gradually become ab

But culturally, there are many big examples where that's exactly what happenened over time: things that are initially considered "just fine" gradually become abhorrent or indefensible. slavery women as property child labor and others that really seem to be moving in that direction: child discipline / spanking circumcision homosexuality and gay marriage confederate flag (which is exactly your example)