The absence of noise
« There are some resources that we hold in common, such as the air we breathe and the water we drink. We take them for granted, but their widespread availability makes everything else we do possible.
I think the absence of noise is a resource of just this sort. More precisely, the valuable thing that we take for granted is the condition of not being addressed. Just as clean air makes respiration possible, silence, in this broader sense, is what makes it possible to think. »
— Matthew B. Crawford, The World Beyond Your Head: On Becoming an Individual in an Age of Distraction