...but it's important not to assume that just because a particular social construct is still in use today, it's "fit" to remain for the foreseeable future.
The longer one exists, the longer it can be expected to continue to exist.
Old constructs have proven their fitness simply by persisting over a long period time.
I think it's easier to make the mistake the other way around, to wrongly assume that a relatively new social construct will remain "fit" far into the future.
