Humans didn’t “invent” laughing at a specific moment; it evolved gradually in animals millions of years before modern humans existed.

Quick Scoop

So…when was laughing invented?

Scientists think laughter-like sounds first appeared in animal play calls very far back in evolutionary history, long before people told jokes. Studies of apes, rats, and other mammals suggest that a common ancestor of many species was already producing “proto-laughter” tens of millions of years ago.

  • Research on great apes and humans traces shared laughter roots to about 10–16 million years ago in our last common ancestor.
  • Other work on playful “vocalizations” across many mammals hints the very first laugh-like sounds could go back even closer to 100 million years, in a much older common ancestor.
  • What we think of as humor and wordplay came much later with language and culture, but the physical act of laughing is much older than any written history.

In written records, jokes show up at least 4,000 years ago on Sumerian clay tablets in ancient Mesopotamia—some of the earliest documented humor we know. But by then, our ancestors had already been laughing (or something very close to it) for millions of years.

Why did laughter evolve?

Early laughter probably wasn’t about stand-up comedy. It seems to have started as a kind of noisy, rhythmic breathing during rough-and-tumble play, especially in young animals.

  • It helped signal “this is just play, not a real fight,” reducing the risk of serious conflict.
  • It strengthened social bonds and kept play going longer, which helped group-living animals cooperate and survive.
  • Over time, as brains and vocal control became more sophisticated, laughter turned into a social tool we could use in more flexible ways—bonding, flirting, easing tension, or even faking amusement for social advantage.

An example: tickling. When young apes or human babies are tickled, they produce breathy, repeated sounds that researchers can analyze and compare across species, showing how similar our basic “laugh engine” is.

From survival signal to human humor

Once humans developed complex language and culture, laughter hit a new stage.

  • Philosophers and writers from ancient Greece to medieval Europe debated what laughter “means” and how it relates to power, religion, and politics.
  • Some theories see laughter as expressing superiority (“we’re laughing at someone”), others as a release of tension, and others as the reaction to unexpected incongruity—a punchline that twists what we expect.
  • Laughter became a key part of stories, theater, satire, and later modern comedy, but all of that sits on top of a very ancient biological reflex.

Even today, a lot of our laughter isn’t about jokes at all—it happens in ordinary conversation, as a way to show friendliness, agreement, or to soften what we’re saying.

Mini timeline of laughing

  1. Deep prehistory (tens of millions of years ago): Primitive “play vocalizations” in mammals; proto-laughter as a survival and bonding tool.
  1. 10–16 million years ago: Laughter-like sounds in the common ancestor of humans and great apes; modern apes and humans still share this pattern.
  1. Hundreds of thousands of years ago: Early humans use laughter in social groups, probably tightly tied to play, bonding, and emerging language.
  1. Around 4,000 years ago: First known written jokes in Sumerian texts; laughter clearly attached to humor in recorded culture.
  1. Today: Laughter is studied by neuroscientists, psychologists, and historians as a complex mix of biology, communication, and culture.

Fast facts (for “when was laughing invented”)

  • There is no single “invention date” for laughing; it evolved over deep time.
  • Biological laughter in our lineage is at least 10–16 million years old.
  • Proto-laughter in broader mammals might be closer to 100 million years old.
  • Written jokes and recorded humor show up about 4,000 years ago in ancient Mesopotamia.

Information gathered from public forums or data available on the internet and portrayed here.