For museums and their public, Impressionism is the Goldilocks movement: not too old or too new, not too challenging or too sappy; just right. Renaissance art may baffle with arcane religious symbolism, contemporary art may baffle on purpose, but put people in a gallery with Claude Monet, Edgar Degas, and Camille Pissarro, and explanatory wall texts feel superfluous. Eyes roam contentedly over canvases suffused with light, vibrant with gesture, and alive with affable people doing pleasant things. What’s not to love?

Famously, of course, Impressionism was not greeted with love at the outset. In 1874, the first Impressionist exhibition was derided in the press as a “vexatious mystification for the public, or the result of mental derangement.” A reviewer called Paul Cézanne “a sort of madman, painting in a state of delirium tremens,” while Berthe Morisot was privately advised by her former teacher to “go to the Louvre twice a week, stand before Correggio for three hours, and ask his forgiveness.” The very term Impressionism was born as a diss, a mocking allusion to Monet’s shaggy, atmospheric painting of the Le Havre waterfront, Impression, Sunrise (1872). Few people saw affability: In 1874, the term commonly applied to Monet and his ilk was “intransigent.”

Impressionism’s rom-com arc from spirited rejection to public rapture informs our fondness for the pictures (plucky little underdogs), and has also provided a lasting model for avant-gardism as a mechanism of cultural change. We now take it for granted that young mavericks should team up to foment new ways of seeing that offend the establishment before being vindicated by soaring auction prices and long museum queues. For most of history, however, that wasn’t the way things worked. Thus the 1874 exhibition has acquired legendary status as the origin point of self-consciously modern art.

Its 150th anniversary this year has been celebrated with numerous exhibitions, most notably “Paris 1874: The Impressionist Moment,” organized by the Musée d’Orsay, in Paris, and the National Gallery of Art, in Washington, D.C. (where it is on view until January 19, 2025). Given the masterpieces that these museums could choose from, this might have been an easygoing lovefest, but the curators—Sylvie Patry and Anne Robbins in Paris, and Mary Morton and Kimberly A. Jones in Washington—have delivered something far more intriguing and valuable: a chance to see what these artists were being intransigent about, and to survey the unexpected turns that art and politics may take in a polarized, traumatized time and place.

Nineteenth-century French history was messy—all those republics, empires, and monarchies tumbling one after the other—but it contains a crucial backstory to Impressionism, often overlooked. In the 1860s, France was the preeminent military and cultural power on the continent. Paris was feted as the most sophisticated, most modern, most beautiful of cities, and the Paris Salon was the most important art exhibition on the planet. Then, in 1870, some fatuous chest bumping between Emperor Napoleon III (nephew of the original) and Otto von Bismarck set off an unimagined catastrophe: By the spring of 1871, mighty France had been vanquished by upstart Prussia, its emperor deposed, its sublime capital bombed and besieged for months. When France sued for peace, Paris rebelled and established its own new socialist-anarchist government, the Commune. In May 1871, the French army moved in to crush the Commune, and the ensuing week of urban warfare killed tens of thousands. In the nine months between the start of the siege in September and the destruction of the Commune in May, perhaps as many as 90,000 Parisians died of starvation and violence.

These events and their impact on French painters are detailed in the art critic Sebastian Smee’s absorbing new book, Paris in Ruins: Love, War, and the Birth of Impressionism. His main focus is on the star-crossed not-quite-lovers Morisot and Édouard Manet, but nobody in this tale escaped unscathed. Morisot was in the city through the bombardment, the famine, and the street fighting; Manet and Degas volunteered for the National Guard; Pierre-Auguste Renoir served in the cavalry. Some of their most promising peers were killed. Everyone saw ghastly things.

[From the April 1892 issue: Some notes on French Impressionism]

And yet nothing about Degas’ ballerinas practicing their tendus or Renoir’s frothy scene of sophisticates out on the town suggests recent experience with terror, starvation, or climbing over dead bodies in the street, though they were painted when those events were still fresh. The Boulevard des Capucines, where the first Impressionist show took place, had been the site of “atrocious violence” in 1871, Smee tells us, but in 1874, Monet’s painting of the street is limpid with light and bustling with top hats and hansom cabs. If most fans of Impressionism remain unaware of its intimacy with the horrors of what Victor Hugo dubbed “l’année terrible,” it’s because the Impressionists did not picture them.

Like Sir Arthur Conan Doyle’s unbarking dog, this suggests an absence in search of a story, and indeed, “Paris 1874” ultimately leaves one with a sense of why they chose to turn away, and how that choice helped set a new course for art. The standard version of Impressionism—the one most people will come through the door with—has, however, always emphasized a different conflict: the David-versus-Goliath contest between the young Impressionists and the illustrious Salon.

With more than 3,000 works displayed cheek by jowl, the 1874 Salon was nearly 20 times the size of the first Impressionist show, and attracted an audience of about half a million—aristocrats, members of the bourgeoisie, workers with families in tow. (Of the latter, one journalist sniffed: “If he could, he would even bring his dog or his cat.”) Presided over by the nation’s Académie des Beaux-Arts, an institution whose pedigree went back to Louis XIV, the Salon was allied with the state and had a vested interest in preserving the status quo. The Impressionists, wanting to preside over themselves, had founded their own organization—the Société Anonyme des Artistes Peintres, Sculpteurs, Graveurs, etc.—with a charter they adapted from the bakers’ union in Pissarro’s hometown.

“Paris 1874” is built from these two shows. With a handful of exceptions (mainly documentary photographs of the shattered city), the art on the walls in Washington now was on the walls in Paris then. (Identifying the relevant works to select from was no small achievement, given the 19th-century catalogs’ lack of images or measurements, and their penchant for unhelpful titles like Portrait.) Labels indicate which exhibition each artwork appeared in, beginning with the Salon’s medal-of-honor winner, Jean-Léon Gérôme’s L’Éminence Grise (1873), alongside Monet’s celebrated and pilloried Impression, Sunrise.

L’Éminence Grise (1873), Jean-Léon Gérôme (© 2024 Museum of Fine Arts, Boston)

The two paintings might be mascots for the opposing teams. Impeccably executed, the Gérôme is an umbrous scene in which Cardinal Richelieu’s right-hand monk, François Leclerc du Tremblay, descends a staircase as the high and mighty doff their caps. The fall of light is dramatic and convincing, the dispatch of color deft, the actors choreographed and costumed to carry you through the action. Every satin ribbon, every curl of Baroque metalwork seems palpable.

Beside it, the Monet looks loose and a bit jangly. The muted gray harbor flits between solidity and dissolution. The orange blob of a sun and its shredded reflection are called into being with an almost militant economy of means. And somehow, the painting glows as if light were passing through the canvas to land at our feet. The Gérôme is a perfect portal into another world. But the Monet is a world. More than just displaying different styles, the pictures embody divergent notions of what art could and should do.

Impression, Sunrise (1872), Claude Monet (© Musée Marmottan Monet, Paris / Studio Christian Baraja SLB)

For 200 years, the Académie had defined and defended visual art—both its manual skill set (perspective, anatomy, composition) and its intellectual status as a branch of rhetoric, conveying moral ideals and building better citizens. (L’Éminence Grise is, among other things, an engaging lesson in French history: When Cardinal Richelieu was the flashy power behind the throne of Louis XIII, the somber Capuchin friar was the “gray eminence” behind the cardinal.) Such content is what made “fine art” fine and separated painters and sculptors from decorators and cabinetmakers.

This value system had stylistic consequences. Narrative clarity demanded visual clarity. Figuration ranked higher than landscapes and still lifes in part because human figures instruct more lucidly than trees and grapes. Space was theatrical and coherent, bodies idealized, actions easily identified. Surfaces were smooth, brushstrokes self-effacing. This is still what we mean by “academic art.”

Most visitors confronting the opening wall at the National Gallery will know which painting they’re supposed to like—and it’s not the one with the fawning courtiers. Impressionism is universally admired, while academic art is sometimes treated as the butt of a joke. Admittedly, Jean Jules Antoine Lecomte Du Nouÿ’s huge, body-waxed Eros with surly cupids is easier to laugh at than to love, but most of the academic art on view strives, like the Gérôme, for gripping plausibility. You can see the assiduous archaeological research that went into the Egyptian bric-a-brac pictured in Lawrence Alma-Tadema’s pietà The Death of the Pharaoh’s First-Born Son (1872), or the armor of the sneaky Greeks descending from their giant gift horse in Henri-Paul Motte’s starlit scene of Troy.

[From the July 1900 issue: Impressionism and appreciation]

Today these pictures look like film stills. It’s easy to imagine Errol Flynn dashing up Gérôme’s stairs, or Timothée Chalamet brooding in the Alma-Tadema gloom. Perhaps the reason such paintings no longer move audiences the way they once did is that we have actual movies to provide that immersive storytelling kick. What we want from painting is something different—something personal, handmade, “authentic” (even when we aren’t quite clear what that means).

It’s a mistake, though, to assume that this impulse was new with Impressionism. Beginning in the 1840s, concurrent with the literary “Realism” of Stendhal and Honoré de Balzac, Realist painters turned away from the studio confections of the Académie and began schlepping their easels out into the weather to paint en plein air—peasants toiling in fields, or fields just being fields. Visible brushstrokes and rough finish were the price (or certificate of authenticity) of a real-time response to a real world. These were aesthetic choices, and in turn they suggested political viewpoints. In place of explicit narratives valorizing order, sacrifice, and loyalty, Realist art carried implicit arguments for social equality (“These plain folk are worthy of being seen”) and individual liberty (“My personal experience counts”).

The Salon was the Académie’s enforcement mechanism: In the absence of anything like today’s gallery system, it represented the only practical path for a French artist to establish a reputation. Yet for decades it flip-flopped—sometimes rejecting Realist art, sometimes accepting it and even rewarding it with prizes. Manet, considered a Realist because of his contemporary subjects and ambiguous messaging, had a famously volatile history with the Salon. In 1874, Degas explained the rationale behind the Société Anonyme in these terms: “The Realist movement no longer has to fight with others. It is, it exists, it needs to show itself on its own.”

But nothing in 1874 was quite that simple. A room at the National Gallery is given over to art about the Franco-Prussian War, both academic and Realist. All of it appeared in the Salon. The contrast is instructive: The elegant bronze by Antonin Mercié, conceived (prematurely) as a monument to victory, was altered in the face of actual events and titled Glory to the Vanquished. Although the naked soldier in the clasp of Victory has breathed his last, arms and wings still zoom ecstatically skyward and draperies flutter. He is beautiful even in death. The corpses laid out on the dirt in Auguste Lançon’s Dead in Line! (1873), dressed in the uniforms they were wearing when they fell, are neither naked nor beautiful. Their skin is gray, and their fists are clenched in cadaveric spasm. In the background, troops march by, officers chat, and a village burns. There is no glory, just the banality of slaughter. Unlike Mercié, Lançon had been at the front.

Dead in Line! (1873), Auguste Lançon (© Département de la Moselle, MdG1870&A, Rebourg)

Here also is Manet’s quiet etching of women queuing at a butcher shop in Paris as food supplies dwindled. Black lines, swift and short, capture a sea of shining umbrellas above a snaking mass of black dresses, at the back of which you can just make out the faint lightning-bolt outline of an upthrust bayonet. It’s a picture with no argument, just a set of observations: patience, desperation, rain.

In “Paris 1874,” a model of curatorial discretion, the art is allowed to speak for itself. Visitors are encouraged to look and guess whether a given work appeared in the Salon or the Société before checking the answer on the label. One quickly finds that applying the standard checklist of Impressionist attributes—“urban life,” “French countryside,” “leisure,” “dappled brushwork”—is remarkably unhelpful. The dog-walking ladies in Giuseppe De Nittis’s Avenue du Bois de Boulogne (1874, Salon) sport the same complicated hats, fashionable bustles, and acres of ruched fabric as Renoir’s The Parisian Girl (1874, Société). Charles-François Daubigny’s The Fields in June (1874, Salon) and Pissarro’s June Morning in Pontoise (1873, Société) are both sunny summer landscapes laid out with on-the-fly brushwork. Both sides did flowers.

As for the celebration of leisure, the Salon seems to have been full of moony girls lounging around and people entertaining fluffy white lapdogs, while the artists we now call Impressionists were paying much more attention to the working world. The glinting light of Pissarro’s Hoarfrost (1873, Société) falls on an old man trudging down a road with a large bundle of wood on his back. The backlit fug of Impression, Sunrise was probably smog—the admirably informative exhibition catalog alerts readers to Stendhal’s description of the same vista, “permeated by the sooty brown smoke of the steamboats.” Pictured at labor, not at play, Degas’ dancers stand around splayfooted, bored and tired, adjusting their shoe ribbons, scratching an itch. Even the bourgeois family outing in Degas’ transcendently odd At the Races in the Countryside (1869, Société) is focused on work: Together in a carriage, husband, wife, and dog are all transfixed by the baby’s wet nurse, doing her job. As for the scenes of mothers and children, it is possible that later observers have overestimated the leisure involved.

Hoarfrost (1873), Camille Pissarro (© Musée d’Orsay, Dist. RMN-Grand Palais / Patrice Schmidt)

Jules-Émile Saintin’s Washerwoman (1874, Salon) is assertively a picture of urban working life, but in an entirely academic mode. The scene is “modern” in the same way that Alma-Tadema’s pharaoh was ancient, time-stamped by an array of meticulously rendered accessories. But the Alma-Tadema at least had the gravitas of tragedy. Saintin is content with smarm: He arranges his working girl awkwardly in the street, grinning coquettishly at the viewer while twirling a pole of white linens and hoisting her skirt to give a peek of ankle—the eternal trope of the trollop.

[Read: Why absolutely everyone hates Renoir]

Then there is art so wonderful and so peculiarly modern, it seems unfair that it went to the Salon. In contrast to Saintin’s washerwoman, Manet’s The Railway (1873) is reticent to the point of truculence. Against the backdrop of an iron railing, a little girl stands with her back to us, watching the steam of a train below, while next to her, a poker-faced young woman glances up from the book and sleeping puppy in her lap to meet our gaze. A bunch of grapes sits on the stone footing of the fence. The emotional tenor is ambiguous, the relationships between woman, child, dog, grapes, and train unclear. Everything is perfectly still and completely unsettled. Why was this at the Salon? Manet believed that appearing there was a necessary career move and declined to join in the Société event.

The Railway (1873), Édouard Manet (Courtesy of the National Gallery of Art)

He had a point. The Société chose, in its egalitarian zeal, to have no jury and to give space to anyone who paid the modest membership fee. The exhibit ended up even more of a grab bag than the Salon, so alongside some of the most adventurous and lasting art of the 1870s, you got Antoine Ferdinand Attendu’s conventional still-life pile of dead birds, and Auguste Louis Marie Ottin’s marble head of Jean-Auguste-Dominique Ingres, the great master of hard-edged Neoclassicism, made more than 30 years earlier.

One function of “Paris 1874” is to debunk the tale of the little exhibition that could. The “first Impressionist exhibition,” it turns out, wasn’t all that Impressionist (only seven of its 31 participants are commonly categorized as such). Many artists took part in both shows simultaneously, prioritizing career opportunities over stylistic allegiance. (Not only was organized avant-gardism not a thing before 1874; it appears not to have been a thing in 1874.) As for those famously annoyed reviews, the catalog explains that they came from a handful of critics who specialized in being annoyed, and that most of the modest attention the Société show received was neutral or even friendly. Impression, Sunrise was “barely noticed.” Just four works sold. Goliath wandered off without a scratch, and David went broke.

But debunking is a short-lived thrill. The real rewards of “Paris 1874” lie in the rising awareness one gets walking through the galleries of a new signal in the noise, a set of affinities beyond either the certainties of the Académie or the earthy truths of Realism, and even a hint of how the unpictured traumas of 1870–71 left their mark. We know about the highlights to come (Monet’s water lilies at Giverny are hanging just down the hall), but there is something much more riveting about the moment before everything shifts into focus. By contrast, later Impressionist shows (there were eight in all) knew what they were about. The standard checklist works there. In 1874, it wasn’t yet clear, but you can begin to see a kind of opening up, a sideways slip into letting light be light and paint be paint.

As the Salon-tagged items demonstrate, the battle over subject matter had abated by 1874. Myths and modernity were both admissible. The shift that followed had less to do with what was being painted than how. The most frequent complaint about Impressionist art concerned style—it was too “sketchy.” The preference for loose brushwork, the disregard for clean edges and smooth gradients, was seen as slapdash and lazy, as if the artists were handing in early drafts in place of a finished thesis. More than one painting in the Société show was compared to “palette scrapings.”

Now we like the slap and the dash. We tend to see those independent-minded brushstrokes as evidence not of diminished attention, but of attention homing in on a new target—a fresh fascination with the transitory fall of light, at the expense, perhaps, of the stable object it falls on. Like a shape seen in the distance, sketchiness has the power to suggest multiple realities at once. Monet’s dark-gray squiggle in the Le Havre water might be a rock or a boat; certainly it is a squiggle of paint. Emphasizing the physicality of the image—the gloppiness of the paint, the visible canvas below—calls attention to the instability of the illusion. Step backwards and it’s a harbor; step forward and it’s bits of colorful dried goo.

At the Races in the Countryside (1869), Edgar Degas (© 2024 Museum of Fine Arts, Boston)

Sketchiness wasn’t the only means of undermining pictorial certainty. Degas never went in for fluttering brushstrokes or elusive edges, but his Ballet Rehearsal (1874) is scattered with pentimenti—the ghosts of a former foot, the trace of an altered elbow, the shadow of a male observer removed from the scene. He had sketched the dancers from life, but then used and reused those drawings for years, reconfiguring them like paper dolls, exactly the way an academic artist might go about peopling a crowd scene. The all-important difference is that Degas shows how the trick is played. In At the Races in the Countryside, the carriage and family are placed so far down and to the right that the nose and shoulder of one of the horses fall off the canvas, as if the painting were a snapshot whose taker was jostled just as the shutter clicked. It’s a way of calling attention to the bucket of artifice and conventions on which painterly illusion depends. This is art being disarmingly honest about being dishonest.

What this fledgling Impressionism puts on offer, distinct from the works around it, is a kind of gentle disruption or incompleteness—a willingness to leave things half-said, an admission of ambiguity, not as a problem to be solved but as a truth to be treasured. Nowhere is this more compelling than in Morisot’s The Cradle (1872). A portrait of the artist’s sister Edma watching her sleeping daughter, it takes a soft subject—mother and child, linen and lace—and girds it with a tensile framework of planes, taut lines, and swooping catenaries. Look beyond the “femininity” and you can see the first steps of the dance with abstraction that would dominate 20th-century painting from Henri Matisse to Richard Diebenkorn. At least as astonishing, though, is the neutrality and distance of the expression on Edma’s face. It might be exhaustion, or reverie, or (because before her marriage, she too had been a gifted professional painter) dispassionate study. Think what you will.

The Cradle is not harrowing or angst-ridden. It doesn’t picture unpleasantness. But when Smee writes of Morisot’s pursuit of “a new language of lightness and evanescence—a language based in close observation, devoid of rhetoric or hysteria,” he’s talking about a response to 1870–71. Both the right-wing empire and the left-wing Commune had ended in pointless, bloody, self-inflicted tragedies. The survivors, at least some of them, had learned to mistrust big ideas. An art about nothing might seem a strange defense, but the act of paying attention to what is rather than what should be—to the particular and ephemeral rather than the abstract and eternal—could be a bulwark against the seductions of ideology.

Resistance, of necessity, adapts to circumstance. In China during the Cultural Revolution, when message-laden art was an instrument of the state, artists belonging to the No Name Group took to clandestine plein air painting in the French mode precisely because it “supported no revolutionary goals—it was hand-made, unique, intimate and personal,” the scholar and artist Chang Yuchen has written. “In this context nature was less a retreat than a chosen battlefield.”

I used to think that Impressionism’s just-rightness was simply a function of time’s passage—that its inventions had seeped so deeply into our culture that they felt comfy. But although familiarity might explain our ease, it doesn’t fully explain Impressionism’s continued hold: the sense that beyond being nice to look at, it still has something to say. The more time I spent in “Paris 1874,” the more I cooled on the soft-edged moniker “impressionist” and warmed to the bristlier “intransigent.” It was a term often applied to unrepentant Communards, but the most intransigent thing of all might just be refusing to tell people what to think.

The contemporary art world, like the world at large, has reentered a period of high moral righteousness. Major institutions and scrappy start-ups share the conviction that the job (or at least a job) of art is to instruct the public in values. Educators, publicists, and artists work hard to ensure that nobody gets left behind and nobody misses the point. But what if leaving the point unfixed is the point?

Whether all of this would have developed in the same way without the violence and disillusionment of the Franco-Prussian War and the Commune is impossible to know. But there are worse lessons to derive from trauma than these: Take pleasure in your senses, question authority, look around you. Look again.

This article appears in the December 2024 print edition with the headline “The Dark Origins of Impressionism.”