Your ancestors could have survived in the tundra; you probably can't.
Your ancestors could have hunted up a good meal almost anyplace; you probably can't.
Your ancestors could hitch up a horse to a wagon; you probably can't.
You can work a computer, your ancestors would be in awe.
You can drive a car, your ancestors would gaze in wonder.
You know how to read, your ancestors very likely did not.

What is knowledge to one era is nearly magical to another, and just because we're of a later date doesn't mean that the magic only goes one way.

The most magical thing humanity ever did -- beyond fire, beyond the wheel -- was to discover how to preserve its collective knowledge so that those who came later wouldn't have to continue pissing in their boots to warm their feet.