[wolverine876]

> There are all kinds of harms in our environment holding us back from hypothetical perfect health, and there always have been.

And as we've learned about them, we've been living much longer and healthier lives (until recently in the US).

[eloisius]

Of course, so get the best night’s sleep that you can, but don’t be distressed about the irreversible brain damage you suffered staying up late as a college student.