The Half-Life of Fame

On January 26, 2020, the day Kobe Bryant's helicopter went down, his Wikipedia page was read 9.5 million times — about 1,300 times its normal traffic. Chadwick Boseman's death that August drew 9.9 million readers in a day, nearly 2,900× his baseline. These are the largest sudden redirections of human attention that Wikipedia records. And they are gone almost immediately: for the median famous person, the excess attention that follows death loses half its size in a single day.

This article measures posthumous attention for 996 people with major Wikipedia presence who died between late 2015 and the end of 2024 — everyone from Elizabeth II to Umberto Eco — using bot-filtered daily pageviews of English Wikipedia. Attention, it turns out, behaves like a radioactive element with a very short half-life and a very long tail of indifference. The interesting differences between kinds of fame are not in how fast the spike decays (that is universal) but in how big it gets, and how long a faint afterglow persists.

1  The universal shape

Normalize every person's daily pageviews by their own pre-death baseline and the curves become almost superimposable: a vertical wall on the day of death, a peak within 24–48 hours, and a collapse that gives up half the excess in a day and ~90% within a week. Pick anyone below — the shape barely changes; only the height does.

The median half-life — the time for excess attention to fall by half from its peak — is one day in every single profession we can measure. Musicians, presidents, scientists: the decay clock is identical. Attention does not linger longer for the more consequential dead.

2  What differs: how loud, and how long the echo

If the decay rate is universal, what distinguishes kinds of fame? Two things. First, the size of the spike: the median athlete's death multiplies their traffic 449-fold; the median scientist's, 102-fold. Athletes and musicians die loudly; scientists die quietly, in part because their baseline readership is already steady and their deaths draw fewer casual searchers.

Second, the echo: how many days until traffic settles back to within twice its old baseline. Here the professions separate in a way that says something about how the dead are used. The median musician takes 36 days to fade back below 2× baseline — people keep returning while the albums play. Politicians and military figures are re-filed within ~2 weeks. Grief, apparently, has genres.

3  The anniversary heartbeat

Individual fame decays; collective memory pulses. Pages for historical traumas beat once a year on their anniversaries with remarkable regularity — and the beat is strongly shaped by round numbers. The September 11 attacks page runs 26–85× its baseline every September 11; the 20th anniversary (2021) was the loudest pulse in the series, followed by a visible slump. D-Day surged for its 75th and 80th. Memory, institutionalized as commemoration, has its own arithmetic.

4  Coda: attention is not consequence

It is tempting to read pageviews as a measure of importance. The clearest counterexample in our window: Roe v. Wade. The page spiked to 1.06 million daily views when the Dobbs draft leaked in May 2022, and 1.27 million the day after the decision that June. Within four days of each spike, more than 80% of the attention was gone. The legal and demographic consequences were, at that point, only beginning — and they compounded for years while the page traffic returned to a few thousand views a day.

The half-life of fame is one day. The half-life of what fame attaches to — a body of songs, a court doctrine, a border drawn in a war — is measured in decades. The gap between those two clocks is, perhaps, the most consistent fact this data has to offer.