Deaths from falling out of bed in the US

Between 2005 and 2021, the number of employed US librarians declined in near-perfect inverse proportion to deaths from falling out of bed, yielding a correlation of -0.97 that the library science community has chosen not to comment on publicly. One might construct a theory in which librarians, through their quiet professional presence, were somehow preventing Americans from tumbling bedward — perhaps via well-timed recommendations of books heavy enough to anchor a mattress. The more likely explanation is that both numbers were moving for entirely unrelated reasons, but this is less interesting and will not be adapted into a thriller.

US librarian employment declined from around 160,000 in the mid-2000s to under 130,000 by the early 2020s, reflecting budget cuts to public library systems, the digitization of reference services, and shifting municipal spending priorities. Deaths from falling out of bed, while a genuinely significant cause of injury mortality particularly in elderly populations, rose slowly over the same period due to an aging US population — the 65+ demographic grew substantially between 2005 and 2021. These trends share no causal mechanism; one reflects fiscal and technological change in public institutions, the other reflects demographic aging. They merely happen to move in opposite directions on the same timeline.

An aging population and a defunded public institution can share a graph without sharing a story. The correlation is arithmetically real and causally meaningless, which is the most common kind.