> "So we ended up with a country that claimed that all men are created equal but did not actually adhere to this."

> yet we did eventually fix it. So much for the unchangeability of US government.

As far as I understand, African Americans were still not considered equal in many states over 100 years after the very bloody Civil War to abolish slavery of African Americans. I don't consider this a good example of a highly changeable government. Or am I misunderstanding your point of the US "eventually fixing it"? 100 years is not a trivial amount of time in a country that is only a little over 200 years old.