Born as a simple gesture with the hands, rock-paper-scissors is today a global phenomenon. The popular hand game is used to decide who does the dishes, to break aimpasseto play with children or to challenge strangers and make decisions lighter and more fun.
But what is behind this intuitive triadic system? Its history spans imperial dynasties, commercial exchanges, symbolic interpretations and cultural transformations. Discovering its origins means telling how humans have found ritualized ways to resolve minimal conflicts and more.
The origin of the game: how it was born
The first evidence of the game appears in China during the Han dynasty, in the 2nd century BC, with a version called shoushling: the gestures were not the same as today but the central idea, a system of three signs in circular balance, was already present.
From here it spread to Japan, where it took on a definite form in the 17th century BC, and is called jan-ken. The modern triad, in fact, was born right here, composed of: Guu (literally translatable as “fist”) our stone; Choki (literally “two fingers”) scissors; And Paa (meaning “open hand”) the card.
Unlike many more elaborate forms of gaming, the jan-ken Japanese has simplified over time to become a universal language. In the 19th century it arrived in Europe through merchants and diplomats, becoming rock-paper-scissors in the Anglo-Saxon world.
A curiosity is that in some areas of Japan there still exists an ancient variant called mushi-kenwhere you play with frog-snail-snake according to a food logic according to which the snake eats the frog, the frog eats the snail and the snail wins because it poisons the snake.
The rules of Chinese morra
As we all know, the goal of rock-paper-scissors is to defeat your opponent by playing a token that beats the other player’s. Specifically:
- The stone wins over scissors, because he breaks it.
- There scissors wins over paper, because the size.
- There paper wins over stonebecause it envelops him.
Some global variants of Chinese morra
One reason for the game’s survival is its cultural plasticity. In fact, it seems that every society has its own culturally adapted version.
Some examples can be found:
- In Indonesia, some versions actually feature the elephant-man-ant triad. In which, the elephant crushes the man, the man tramples the ant and the latter bites the elephant in a vulnerable place.
- A further variant developed in Thailand: in which they use monkey-man-God. A non-circular hierarchical system, for which God always wins and is however used as a moral metaphor, not so much as a fair game.
- A final variable, geographically closer, has appeared in some municipalities in the Puglia region, where the “paper” has been changed for the “network”. Thus creating the triad: net-scissors-stone. It is thought that the development of fishing has accentuated the change of objects.
The universal diffusion and neuroscientific theories of the game
The universal diffusion of rock-paper-scissors in the West is relatively recent and follows the trajectories of trade between Europe, the United States and Japan. Although hand games such as morra already existed in Europe, the circular triadic system was not known.
The real turning point came in the 19th century, when Japan opened up to international contacts: the jan-jen it began to be described by travelers and merchants as a simple and fascinating game, easily exportable.
The decisive step, however, occurred after the Second World War. American soldiers in Japan learn the game and bring it back to the United States, where it quickly becomes an informal method of making decisions.
In the 60s and 70s it reached schools, television and pop culture, losing any exotic connotation and becoming an everyday gesture. From there it bounces around Europe, especially in Anglo-Saxon countries, until it becomes a universal reference.
Beyond its informality, rock-paper-scissors is a perfect mathematical model to be replicated. The probabilities are in fact balanced, no move dominates and the only optimal strategy is to distribute the choices in an unpredictable way and hope for luck.
Statistical studies, which have applied human behavior and neurological reflexes to the game, show that after a victory we tend to repeat the same move; after a defeat, however, we change according to a regular pattern and, finally, after a draw, the brain enters “extreme analysis” mode, activating neurological areas responsible for predicting the behavior of others.
From a science perspective, the rock-paper-scissors-game is valuable because it shows how we make decisions under pressure in a controlled environment. For this reason it has been used in research on impulsivity, executive control and interactive learning. The strength of the game in fact lies not in its complexity, but in its ability to be a universal tool: no language to translate, no skills to learn, no power or strategy to use.
An ancient game that continues to work precisely because, after all, it reminds us of something simple but essential: the possibility of resolving the smallest conflicts together, lightly.
