What the data actually shows
The foundational account is Leon Festinger's social comparison theory (1954), which argued that people have a basic drive to evaluate their own abilities and opinions, and that in the absence of objective, non-social standards they do so by comparing themselves with others. Questions about whether your life is going well rarely have an objective yardstick, so the mind substitutes a social one almost automatically.
Evolutionary and social-rank perspectives add why the tendency might be so deeply wired. Paul Gilbert's work on social rank theory suggests that humans are highly sensitive to their relative standing in a group, and that this sensitivity plausibly had survival and status value in ancestral environments where rank affected access to resources, safety, and mates. On this view, monitoring how you compare to others is not a glitch but an old, functional system.
Taken together, the research treats comparison as a feature of normal human cognition rather than a personal weakness. It is something the overwhelming majority of people do, much of it automatically and below conscious awareness. That is worth saying plainly, because the feeling that you 'shouldn't' compare often adds a second layer of distress on top of the first.
Why this feels different from how it actually is
Comparison feels like a personal failing rather than a universal reflex because you only ever experience your own version of it. You notice yourself measuring up against others and assume you are unusually insecure, without seeing that nearly everyone around you is running the same private calculation about you and about each other.
It also feels different now because the comparison set has changed faster than the underlying instinct. The drive evolved in small groups where you compared yourself to a handful of people you actually knew. Modern media hands you a near-infinite, filtered stream of strangers shown at their most impressive, so an old system built for a village now runs on an unrepresentative global highlight reel.
And the asymmetry of information makes it worse. You see your own life from the inside, including every doubt and unfinished thing, and everyone else from the outside, already edited. The same comparison machinery that might once have given you a roughly accurate read on your standing now feeds on lopsided inputs, which is why it so often points in the wrong direction.
What the research says to do about it
The most consistent lesson from the research is to work on the comparison set rather than trying to switch off comparison entirely. Because the tendency is built in, fighting it directly tends to fail; correcting and widening the sample you compare against is more achievable and addresses the actual source of distortion. Deliberately picturing the full distribution — not just the people doing best — pulls your sense of 'normal' back toward reality.
Reducing exposure to the most curated, upward-comparison-heavy inputs also helps. Several studies of people cutting back on heavily filtered social media report improvements in wellbeing and self-perception, concentrated among heavier users. Less distorted input produces a less distorted self-assessment, without requiring you to stop comparing at all.
Where comparison serves a purpose, it can be pointed deliberately. Comparing yourself to others slightly ahead of you can inform and motivate when you choose it consciously and keep it specific; the damage comes mostly from constant, involuntary, vague comparison against an unrepresentative top slice. Some people also find it useful to swap social comparison for temporal comparison — measuring against their own past — which the research treats more kindly.
What the research says does not help
Telling yourself to simply stop comparing rarely works, because the tendency is automatic and deeply wired. Treating a normal reflex as a character flaw tends to add shame without reducing the comparing, and the effort to suppress a thought can make it more intrusive.
Consuming more aspirational and 'motivational' content does not calm comparison; the research generally shows it raises the bar you measure yourself against and widens the felt gap. Curated success imagery is the input most likely to make the instinct misfire.
Generic self-esteem affirmations — repeating that you are great — show weak and short-lived effects and can backfire for people who do not believe them. Honest context about where most people actually stand tends to outperform positive self-talk, because it engages the real driver, the distorted comparison set, rather than papering over it.
Real numbers in context
Comparison is not a fringe habit but close to universal: social comparison theory has been one of the most studied ideas in social psychology for roughly seventy years, with hundreds of studies confirming that people routinely evaluate themselves against others, especially when objective standards are missing. There is no reliable 'normal amount' to quote, because the tendency is woven into ordinary cognition rather than being a discrete behaviour you can count.
What can be quantified is how unrepresentative the modern comparison set is. The lives people measure themselves against are skewed sharply upward — feeds surface the most impressive fraction of outcomes, and heavy social media users tend to overestimate how happy and successful others are. So the issue the data points to is not that humans compare, which they always have, but that the sample now sits far above the real middle.