Nobody planned it — and that is precisely what makes it so devastating. Coco Chanel, the most scrutinized woman in fashion, stepped off a boat on the French Riviera one summer in the 1920s, and she was bronzed. The Mediterranean sun had done its work quietly without her attention while she vacationed at the seaside resorts along the coast. But she wore it as returning, and the world could not look away and got wild. The fascination was immediate and total. Centuries of cultural consensus collapsed in a single season:  tan meant shiny, leisure, and energetic, wearing it was cool and showing off the new fashion. The upper class wanted it, and the middle class would soon follow. And the medical establishment was there to lend it legitimacy: Finsen's Nobel Prize, the sanatorium movement, the vitamin D discoveries, which were a immediate apparatus of scientific authority that transformed a fashion accident into a health movement. If physicians at elite clinics were prescribing sun baths, then seeking the sun was not mere vanity. It was health-consciousness, modern and scientific and progressive. Chanel had not started a trend. She had lit a fuse.

French beachside resorts that had previously closed for the summer stayed open. Tanning articles and advertisements multiplied in the pages of Vogue and Harper's Bazaar. Sunlight therapy was prescribed for almost every ailment from fatigue to tuberculosis. Chanel was not alone in driving the change. Hollywood amplified it. Stars of the silver screen appeared with bronzed luminous outlook and were photographed in sharp color under the California sun, becoming the new aesthetic template for millions of fans. A tan face on a movie poster was no longer a mark of outdoor work but of glamour, health, and the freedom to live beautifully. By the 1940s, the tan had become inseparable from the image of the modern, active, desirable body. The bikini arrived in 1946, engineered precisely for maximum skin exposure, and nobody pretended otherwise.

The 1920s and 1930s also saw a broader cultural embrace of outdoor life that reinforced tanning as a byproduct of vitality rather than laziness. Tennis, swimming, cycling, and hiking surged in popularity across Britain, France, Germany, and the United States. The rise of the weekend, formalized by labor reforms and the shortening of the working week, gave the urban middle class both the time and the social permission to spend leisure hours outside. Resort towns along the English Channel, the Atlantic coast of France, and the American Eastern Seaboard expanded rapidly to meet the demand. Swimwear manufacturers began designing suits that revealed more skin, and the act of lying in the sun, which would have seemed bizarre or vulgar to a Victorian, became a recognized leisure pursuit with its own vocabulary and etiquette.

In the United States, the automobile accelerated the shift. As car ownership spread through the 1920s and 1930s, families could reach beaches, lakes, and mountain trails that had previously been inaccessible. Road-trip culture and the national park system, expanded aggressively under Theodore Roosevelt and his successors, turned outdoor recreation into an American value. The tan that resulted was not incidental ; it was an evidence of time available and money enough to spend it outdoors. Magazines like Life and Saturday Evening Post published photographs of sun-kissed families at the shore, and advertisers were quick to associate their products — soft drinks, automobiles, cigarettes — with the bronzed, healthy-looking bodies in the frame.

In Europe, the interwar years gave outdoor enthusiasm a more ideological edge. Youth movements in Germany, Britain, and Scandinavia promoted hiking, camping, and physical culture as antidotes to the perceived softness of urban industrial life. The body, tanned and fit, became a symbol of national vigor. While the darker ends of this ideology belong to a different story, the broader effect — linking sun exposure to health, discipline, and modernity — penetrated mainstream culture across the continent and proved remarkably durable long after the politics that amplified it had collapsed.

By the 1950s and 1960s, with color film and commercial air travel available to the growing middle class, the culture of sunbathing had gone fully mainstream. Britons flocked to Spain. Americans drove to Florida. Australians, who happened to live in one of the most UV-intense environments on Earth, went to the beach as a matter of national identity. The preference for a darker skin tone has remained persistent in Europe and America to this day. In Asia, by contrast, the preference for pale skin has been equally persistent, a cultural mirror image of the Western story and one worth its own telling.

The consequences of this shift were already being written into the epidemiological record, even if the public had not yet read them. Melanoma had been a rare cancer at the start of the twentieth century, but the decades that followed the tanning boom told a different story. In the United States, around 1950 — a generation after sunbathing became fashionable — roughly 3 people per 100,000 were being diagnosed with melanoma annually. By the late twentieth century, that rate had climbed to approximately 14 per 100,000 men and 11 per 100,000 women. Polsky et al. traced this arc explicitly, concluding that changes in fashion, perceptions of tanned skin, and socioeconomic factors had contributed directly to the escalation of melanoma across the century.

The pattern held across continents. By the early 1990s, oncologists and epidemiologists were alarmed by a sharp rise in malignant melanoma in fair-skinned populations across Europe, the United States, Canada, and Australia — a surge that had begun in the 1930s and accelerated dramatically between 1950 and 1980, precisely tracking the decades of heaviest recreational sun exposure . Across North America, Northern Europe, Australia, and New Zealand, annual melanoma incidence rose as rapidly as 4 to 6 percent per year in fair-skinned populations during this period . The toll was steepest in the Southern Hemisphere. Australia and New Zealand — where fair-skinned populations of Anglo-Celtic descent had built outdoor life into a national identity, under some of the planet's most intense UV radiation — recorded the highest melanoma incidence and mortality rates in the world. In Australia alone, new melanoma diagnoses grew from 3,561 in 1982 to over 15,000 by 2021, a near-quadrupling that reflected decades of accumulated sun exposure. New Zealand, despite its smaller population, eventually surpassed even Australia, recording the highest per capita melanoma rate on Earth — a distinction epidemiologists attributed directly to its population's outdoor habits and historically weaker public health response.

Melanoma therefore became the epidemic of the 20th century. Since it is the most lethal form of skin cancer, and effective therapy was lacking during the century, melanoma had been described as "the ticking time bomb".  Many people are not aware that sun exposure without protection can bring them the danger of melanoma, and some of them did not understand that they belong to high-risk group of getting this deadly disease. 

Reference

• Chang, Caroline, et al. "More Skin, More Sun, More Tan, More Melanoma." American Journal of Public Health, vol. 104, no. 11, 2014. doi:10.2105/AJPH.2014.302185.
• Gershenwald, Jeffrey E., and Richard A. Scolyer, et al. "Melanoma Staging: Evidence-Based Changes in the American Joint Committee on Cancer Eighth Edition Cancer Staging Manual." CA: A Cancer Journal for Clinicians, vol. 67, no. 6, 2017, pp. 472–492. doi:10.3322/caac.21409.
• Rastrelli, Marco, et al. "Melanoma: Epidemiology, Risk Factors, Pathogenesis, Diagnosis and Classification." In Vivo, vol. 28, no. 6, 2014, pp. 1005–1011. pubmed.ncbi.nlm.nih.gov/25398793.
• Cancer Australia. "Melanoma of the Skin Statistics." Cancer Australia, 2024, www.canceraustralia.gov.au/cancer-types/melanoma-skin/melanoma-skin-statistics.
• Sneyd, Mary Jane, and Braeden Cox. "A Comparison of Trends in Melanoma Mortality in New Zealand and Australia: The Two Countries with the Highest Melanoma Incidence and Mortality in the World." BMC Cancer, vol. 13, 2013, p. 372. doi:10.1186/1471-2407-13-372.