It is not just that our ancestors did not have microwave ovens.
Nor that they could not have imagined the existence of microwave ovens.
It is not even that if they could have imagined that such things could exist, they would never have been able to imagine that these miracles would be available to almost everyone, rather than just the kings and perhaps a count or a duke.
While there is a long way to go, let’s not discount what we’ve already accomplished.
We are living better than kings could have dreamed.
I like how David Brin explains this here: