Declinism

Category: Probability & Belief

The gut conviction that things used to be better and are now sliding downhill, usually held with total confidence and almost no data.

How it works

Declinism runs on two engines working together. The first is biased memory: your brain preferentially keeps the good bits and lets the tedium, fear, and injustice of the past fade, a process Mitchell and Thompson labeled rosy retrospection, so the "good old days" get retroactively upgraded. The second is biased exposure: news, social media, and outrage economies feed you a nonstop diet of the worst things happening right now, so the present feels like a crisis by construction. Stack a flattering, edited past against a raw, unfiltered present and decline is the inevitable conclusion, even when the hard numbers point the other way. Mastroianni and Gilbert showed this precisely with morality: people in at least 60 nations have believed humans are getting less kind for at least 70 years, yet their ratings of the actual people around them have not budged.

Where you'll see it

  • The illusion of moral decline. Mastroianni and Gilbert (Nature, 2023) pulled archival and original data from more than 12 million people across at least 60 countries. Everyone agreed morality had collapsed. But when you ask people to rate the kindness and honesty of the people actually in their lives right now, those ratings have stayed flat for decades. The decline lives entirely in the story, not the behavior.
  • Crime that fell while everyone swore it rose. In 23 of 27 Gallup surveys since 1993, at least 60% of Americans said there was more crime than the year before, and by October 2023 Gallup found 77% believed crime was rising nationally. Meanwhile FBI data shows the violent crime rate dropped 49% and property crime 59% between 1993 and 2022. Two straight decades of people being wrong in the same direction.
  • Ipsos Perils of Perception. Across dozens of countries, only 7% of people correctly believed the murder rate was lower than in 2000 (it was down about 29% overall). People guessed 20% of teenage girls give birth each year; the real figure is roughly 2%. The consistent error is always pessimistic: the world is grimmer in your head than on the spreadsheet.
  • The vacation you enjoyed more after it ended. Mitchell, Thompson, Peterson and Cronk (1997) tracked people through a European trip, a Thanksgiving break, and a California bike tour. Anticipation was rosy, the actual experience was rated lower and grumpier in the moment, and weeks later the memory got upgraded again. Same event, three different verdicts, and the past-tense version always won.

Where it comes from

The word "declinism" predates the psychology. Cultural critics used it for the sweeping "civilization is doomed" tradition running from Gibbon's "Decline and Fall of the Roman Empire" (1776) through Oswald Spengler's "The Decline of the West" (1918), which Adam Gopnik called the great summit of the genre. The cognitive machinery underneath it got its name in 1994, when Terence Mitchell and Leigh Thompson coined rosy retrospection in a book chapter on how people re-evaluate events over time, then demonstrated it empirically in a 1997 Journal of Experimental Social Psychology study. Declinism is essentially rosy retrospection scaled up from your own memories to entire societies. The definitive modern evidence arrived in 2023, when Adam Mastroianni and Daniel Gilbert published "The illusion of moral decline" in Nature, giving the bias a mechanism (biased memory plus biased exposure) and a mountain of data.

How to counter it

Name the metric or drop the claim. When "everything is getting worse" fires, force it into a testable shape: worse on what number, over what window, versus what starting point? If you cannot name the measure and look it up, you do not have a judgment, you have a mood dressed as one.

Time-match your evidence. You are pitting an edited highlight reel of the past against a raw live feed of the present, and that mismatch alone manufactures decline. Pull equally unfiltered data from both eras: read an actual 1975 newspaper, not your grandparent's summary of it, and check the crime or poverty stats for the exact year you are romanticizing.

Zoom from "society" down to what you can see. Mastroianni and Gilbert found the "people are getting less kind" illusion weakens or reverses the moment you rate specific individuals you actually know. So when you feel the slide, stop judging "everyone" and ask whether the concrete people and facts in front of you are truly worse than a decade ago.

Audit the feed that feeds the fear. Biased exposure does half the work: outrage and catastrophe get amplified while "nothing bad happened to 300 million people today" never runs as a headline. Deliberately add sources that report base rates and long-run trends, and treat your own dread as evidence about your media diet, not about the world.

The tell

You say some version of "back in my day" or "nobody does X anymore," you feel certain, and you cannot cite a single number to back it up. Bonus tell: the golden era you're mourning is conveniently the one you were young in.

Related biases

References

  1. Adam M. Mastroianni, Daniel T. Gilbert (2023). The illusion of moral decline. Nature, 618, 782-789
  2. Terence R. Mitchell, Leigh Thompson, Erika Peterson, Randy Cronk (1997). Temporal Adjustments in the Evaluation of Events: The "Rosy View". Journal of Experimental Social Psychology, 33(4), 421-448
  3. Terence R. Mitchell, Leigh Thompson (1994). A theory of temporal adjustments of the evaluation of events: Rosy Prospection and Rosy Retrospection. Advances in Managerial Cognition and Organizational Information Processing, 5, 85-114 (JAI Press)
  4. John Gramlich, Pew Research Center (2024). What the data says about crime in the U.S.. Pew Research Center
  5. Gallup (Megan Brenan) (2023). More Americans See U.S. Crime Problem as Serious. Gallup News