So it's natural and right that in the world, there will be people who want to revisit the received wisdom and best practices for how we live our lives, regulate our economy, and organize our society. But not a license to simply throw out the systems we rely on. Sure, maybe they're outdated or unnecessary, but maybe not.

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That's where "Chesterton's Fence" comes in:

> Let us say, for the sake of simplicity, a fence or gate erected across a road. The more modern type of reformer goes gaily up to it and says, "I don't see the use of this; let us clear it away." To which the more intelligent type of reformer will do well to answer: "If you don't see the use of it, I certainly won't let you clear it away. Go away and think.

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> "Then, when you can come back and tell me that you do see the use of it, I may allow you to destroy it."

https://en.wikipedia.org/wiki/G._K._Chesterton#Chesterton's_fence

In other words, it's not enough to say, "This principle gets in the way of something I want to do, so let's throw it out because I'm sure the inconvenience I'm experiencing is worse than the consequences of doing away with it." You need to have a *theory* of how you will prevent the harms the principle protects us from once you tear it down.

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That theory *can* be "the harms are imaginary" so it doesn't matter. Like, if you get rid of all the measures that defend us from hexes placed by evil witches, it's OK to say, "This is safe because evil witches aren't real and neither are hexes."

But you'd better be sure! After all, some preventative measures work so well that no living person has experienced the harms they guard us against. It's easy to mistake these for imaginary or exaggerated.

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Think of the antivaxers who are ideologically committed to a world in which human beings do not have a shared destiny, meaning that no one has a moral claim over the choices you make. Motivated reasoning lets those people rationalize their way into imagining that measles - a deadly and ferociously contagious disease that was a scourge for millennia until we all but extinguished it - was no big deal:

https://en.wikipedia.org/wiki/Measles:_A_Dangerous_Illness

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