Where does the left-right political spectrum come from?

The labels come from the French Revolution. In 1789, delegates in the French National Assembly were divided over how much power King Louis XVI should keep, and the factions sat on opposite sides of the hall. Those pushing for change sat to the presiding officer's left, and those defending the monarchy sat to his right. The seating habit became a way of describing political positions, and the vocabulary spread across the world. [1] [2]

According to The Conversation, the National Constitutive Assembly in 1789 was deciding whether the king should have a veto and, if so, whether it should be absolute or only suspensive. Supporters of the absolute veto sat on the president's right, and those who wanted a highly restricted veto sat on the left. The layout of the room thus took on political meaning. [3]

The grouping persisted in later sessions. A conservative baron quoted by History said he tried to sit in different parts of the hall to keep his independence of opinion, but had to abandon the left or else vote alone and be jeered at from the galleries. A 2011 chapter on left-right ideology notes that during the National Convention of 1792 and 1793, deputies signaled their stance on the king's fate partly by where they placed themselves in the hall. [1] [4]

AFP's fact check reports that historians describe the placement as haphazard. David Bell of Princeton said the opposite could have occurred. Dutch researchers Frits Bienfait and Walter van Beek, citing W.G. Runciman, wrote that the choice was accidental and could easily have gone the other way. They explain that with more than 500 representatives, a roll-call vote would have taken too long, so Mirabeau's supporters gathered left of the president and Malouet's supporters right. [2]

The Conversation adds that the right side carried associations of honor in Christian tradition, such as sitting at the right hand of God. The sources do not say whether this influenced the original seating, so its role is unclear. [3]

Newspapers in the 1790s referred to the progressive left and traditionalist right of the assembly. The distinction faded under Napoleon but returned with the Bourbon Restoration in 1814. By the mid-19th century the terms were everyday French shorthand, and parties described themselves as center left or extreme right. The terms reached the wider world during the 1800s but were not common in English-speaking countries until the early 20th century. [1]

The first English use of left-right in this sense is recorded in an 1794 translation of Camille Desmoulins. The phrases right wing and left wing appear in a British parliamentary debate on 26 August 1841, in a context other than the French assembly. Wordorigins.org presumes that wing comes from the military sense of the divisions flanking an army's center. [5]

Some social media posts trace the terms to Ecclesiastes 10:2, which says the wise heart inclines to the right and the fool's to the left. The verse is real, but historians say it has nothing to do with the origin. Rebecca Spang of Indiana University and David Bell both place the origin in the French Revolution, and Bell called the Bible theory silly. [2]