| You ask a difficult and important question. The two relevant ideas I know are: 1. Chesterton's Fence: "I don't understand why this exists, so let's tear it down" is an big and tempting error. Wait until you understand. 2. Consequences of societal change are inherently unknowable, which is why revolutions usually end in tragedy. The sane approach is to change society incrementally, see what happens, and adjust and learn as you go. The educated reader may notice that 1+2 is pretty much the sane version of Conservatism. I'm not a conservative myself, but as I've grown older and wiser, I've come to understand and respect the philosophy. |
Right, but the quote I was questioning seemed to indicate that this principle should be applied in cases where no one knows or perhaps even there is no way to know what the purpose is or even in there is one.
That’s a much stronger claim than Chesterton’s fence, because a fence is at least a pretty clear indication of human intent (prevent creatures or objects of a certain size from traveling from one particular area to another), and the class of reasons to build a fence is fairly bounded and can feasibly be investigated.
Also, I’m not sure how Chesterton’s fence is used in detail, but I wouldn’t agree that you must discover the original reason for the fence to justify removing it. You should investigate all the normal reasons a fence would be there, and if no extant reason turns up, tear down the fence and maybe keep an eye out for a while in case you missed something.
I don’t want Chesterton’s fence to devolve all the way to the precautionary principle. Sure, maybe the fence was never needed as a traditional fence, and instead was built by ancient people because they were visited by aliens who said they will destroy Earth if there is ever not a fence in that location. Sure, that’s probably physically possible, but keeping the fence around because of that possibility is terrible epistemology.