In one sense, you can't; the world they lived in lived with them, and when they were gone their world was gone with them too.

In another sense, you can't *avoid* that world; the world they lived in was one they *created*, physically, and much of it is still here with us, shaping us as they shaped it.

And remember, none of the people who came before us ever experienced anything but pieces of their world, just like we only ever experience pieces of our own. But you can at least try to show your kids as many of those pieces as possible.