This is because once we learn new information, it is nearly impossible to reenter the headspace we were in before we learned that information. And so we look back at parents who spanked their kids, for example, and wonder how they could have thought that was a good idea.
Similarly, our personal pasts are full of mistakes we can't believe we made. We did things then that we would never do now, and this is precisely because we have information now that we didn't have, or weren't able to access, then.
From ideas about how to raise children to how to treat the environment, our collective human past sometimes reads like a document on what not to do. In many ways, this is exactly as it should be...read more>>>...
