Who decided left was left? It’s a question that’s far more fascinating than it first appears. For something we use every day, turning the corner, following instructions, or even giving directions, the idea of “left” seems so basic it hardly warrants questioning. But like many concepts that feel intuitively obvious, the label “left” is the result of a complex mix of language, culture, history, and even biology. So who decided that the side most of us aren’t dominant on should be called “left”?
To answer this, we have to delve into language history. In English, the word “left” comes from the Old English lyft, meaning weak or idle, which already hints at a historical bias. Many ancient cultures associated the left side with bad luck or weakness. The Latin word for left is sinister, a word that survives in modern English with distinctly ominous connotations. Conversely, dexter, the Latin for right, gave us “dexterity”, skill, nimbleness, and grace. This linguistic divide wasn’t just semantic; it reflected a deep-rooted cultural discomfort with left-handedness and, by extension, the left side of the body.
Throughout history, being left-handed was often seen as undesirable. Children were corrected in school, tools were built for the right-handed majority, and social superstitions surrounded the use of the left hand. So, when early societies began to label the world in terms of direction, “right” often took precedence in both naming and favour. But that still doesn’t fully answer who decided left was left; it merely explains how the bias emerged.
Anthropologists suggest that directionality, as we understand it, began to solidify as humans settled and built more structured communities. Imagine early trade routes or settlements needing standardised maps or instructions. A shared sense of orientation would have been essential. The decision to orient maps with north at the top (another arbitrary but now universal decision) may have influenced how we determined left and right on paper. Once a standard frame of reference was established, the concept of left and right became formalised. Cartographers, architects, and governments needed consistent directional language. At that point, left became institutionalised, though its name still carried cultural baggage.
On a more primal level, the brain itself plays a role in how we experience left and right. Our brains are split into hemispheres, with each side controlling the opposite half of the body. Right-handedness, dominant in roughly 90% of the population, is a product of this neurological wiring. This biological dominance may have influenced ancient humans’ collective perception that the “right” side was superior. From there, defining the “other” side as left became a convenient oppositional label, one steeped in subtle social hierarchy.
But if the term “left” is so culturally loaded, why hasn’t it changed? The answer might lie in the power of repetition. Once something becomes embedded in language, it’s incredibly resistant to change. Even though the stigma around being left-handed has largely faded in many parts of the world, the word “left” still carries its historical weight both literally and metaphorically. In politics, for example, we talk about the “left-wing” and “right-wing,” terms that have evolved far beyond physical direction but still retain the same origin story of opposition.
So, who decided left was left? The truth is, no single person did. It was a long, messy, cultural process shaped by fear, superstition, biology, and necessity. Like many aspects of human civilisation, it was never a decision made in a single moment, but rather a gradual drift toward consensus. Still, every time you hear “take a left turn,” you’re participating in a legacy that spans millennia. It’s a small reminder that even the most ordinary words are steeped in extraordinary history
