Casual Living

The Casual Living Ubertrend’s modern arc traces to Waikīkī in the 1940s, when a prominent Hawaiian surfer named Duke Kahanamoku approached the management of the Royal Hawaiian Hotel and proposed that staff begin wearing Hawaiian shirts every Friday. The trend, initially called Aloha Shirt Friday, was renamed Aloha Friday in 1966.

What made Kahanamoku so influential with Royal Hawaiian Hotel management was his prominent role in popularizing an ancient Hawaiian sport, surfing, beginning in Southern California in 1912. Hawaii became the 50th U.S. state on August 21, 1959, and the number of visitors to the islands jumped from 296,000 per year to 1.7 million between 1960 and 1970. By 1985, Hawaii tourism arrivals had approached 5 million, exposing many visitors to the islands’ more casual lifestyle.

Aloha Friday slowly began spreading east to California in the 1970s, and by the 1990s it had made its way to New York, acquiring a new moniker along the way: Casual Friday. The shirt was the leading edge; the entire dress code, then the entire conduct code, would follow.

The casualization wave produced what amounts to a planetary uniform: blue jeans, T-shirts and sneakers. Each has a precise origin and a runaway adoption curve.

Levi Strauss, a Bavarian immigrant in San Francisco, was witnessing the 1853 gold rush firsthand. He noticed that prospectors needed durable trousers; his first creation was a pair of miner’s overalls made from brown cotton tent canvas. He and tailor Jacob Davis switched to serge de Nîmes, dyed it indigo, and on May 20, 1873, Strauss paid $69 for the patent application that incorporated Davis’s riveting technique. The pants were nicknamed jeans after the city of Genoa, where sailors wore similar blue cotton. By 2016, 143 years after the patent, the average U.S. consumer owned nine denim garments, including six pairs of jeans. The global denim jeans market was estimated at $87 billion in 2024 and is projected to reach $122 billion by 2030 (Grand View Research).

The T-shirt is younger. The U.S. Navy first used it as undergarment issue around the 1898 Spanish-American War; today the world buys more than 10 billion T-shirts annually. With or without promotional messages, the category is a $20 billion industry. Sneakers trace to 1892, when the Colchester Rubber Co., based in Colchester, Connecticut, introduced the world’s first basketball sneaker: a five-inch high-top. United States Rubber Co. consolidated 30 footwear companies into one brand, Keds, by 1916. They were nicknamed sneakers because they were so quiet you could sneak up on someone in them.

The next layer was athleisure — a portmanteau of athletic and leisure that fanned out from hip-hop and yoga to the airport, then to the dinner table. The athleisure boom accelerated far beyond U.S. borders: the global athleisure market reached $422 billion in 2025 and is projected to approach $892 billion by 2033 (Grand View Research). Footwear represents 64.7% of global sportswear revenue. Leggings, in particular, ditched the muted past for colorful patterns; in 2017, U.S. imports of women’s elastic knit pants surpassed those of jeans for the first time. The science-fiction prediction of catsuit-as-default may finally be arriving.

The dress-down arc has come with a conduct-down companion. On Broadway, badly behaving audiences are now a perennial subject of New York Post coverage — ringing phones, glowing screens, crinkling wrappers, drink-fueled commentary. In the 2015 revival of She Loves Me, lead Laura Benanti was singing Will He Like Me when a cellphone went off. “I’ll wait,” she said. The phone continued to ring. “We’ll all wait,” she added, and the orchestra stopped playing until the phone was silenced.

Sports fans have produced the bigger ledger. The 2004 Pacers–Pistons brawl at the Palace of Auburn Hills saw fans and players throwing punches, one spectator hurling a chair, and the NBA suspending nine players for a combined 140-plus games. Commissioner David Stern called the incident “shocking, repulsive and inexcusable.” The youth-sports referee crisis followed at scale: 70% of new referees quit within three years, citing harassment, per the National Association of Sports Officials.

Politics has been infected. The Capitol-floor heckling of President Obama in 2009, the Trump-rally violence cycle, and the spread of incivility across cable-news panels are now case studies in the same casualization arc. Fully 74% of Americans told the AP-NORC Center for Public Affairs Research in 2016 that society is generally more ill-mannered than it was 30 years ago. The number has continued to climb.

Casual Living is three forces braided together: the dress-down cascade, the decorum collapse, and the digital amplifier. The first describes how the clothing got casual. The second describes how the conduct got casual. The third explains why the conduct collapse has been faster and more visible than any prior civility cycle in history.

The dress-down cascade is the most-measured of the three. Levi’s, Gap, Dockers and the Silicon Valley wardrobe (Apple, Intel, Sun Microsystems) defined “business casual” in the 1980s; 75% U.S. business adoption of Casual Friday by 1996 finished the job. The pendulum has barely swung back. NPD’s 2011 tailored-clothing uptick (men’s suits +10.8%) was a one-cycle blip. By 2017, sales had resumed their steady decline. Athleisure took the freed wallet share.

The decorum collapse is the more painful one. By 2015, IATA had reported 10,854 worldwide unruly-passenger cases (one in every 1,205 flights). The FAA reported more than 1,240 unruly-passenger cases in 2024, noting that the incident rate had dropped more than 80% from the early-2021 pandemic-era peak. The leading cause remains alcohol or drug intoxication. A Harvard study by Katherine DeCelles and James Collins found that the chance of an air-rage incident in economy is 3.84 times greater when there is a first-class section visible.

The digital amplifier is the multiplier on both. USA Today warned in 2007 that “nasty comments, sometimes even death threats, have become ubiquitous on virtually any site that seeks to engage readers in discussion.” NPR shut down its comments section in 2016. Reddit, X, Discord and Twitch have all fought variants of the trolling and harassment problem. Pepe the Frog was hijacked by the alt-right. Megan Meier was an early prototype; Gabriella Green, 12, hanged herself January 10, 2018 in Panama City Beach after being cyberbullied by two 12-year-old classmates.

If casualization has a payoff, it also has a body count. The most documented sub-Ubertrend is the rage index: road rage, air rage, “going postal,” cyberbullying, mass shootings.

Road rage is the largest entry in the ledger. The 1988 KTLA coinage was followed by a NHTSA-tracked surge in “aggressive driving” behaviors. The 1990s added 30 million cars and 600 billion additional annual U.S. miles. A 2002 Public Agenda study had 35% of Americans admitting to aggressive driving; AAA’s 2014 update put the figure at 78%, with tailgating (51%) and yelling at other drivers (47%) leading. Fatal accidents involving aggressive driving jumped from 26 in 2004 to 247 in 2013 in Washington Post’s NHTSA analysis. Now in 2023, the U.S. is averaging one road-rage shooting victim every 18 hours.

Air rage has its own arc. On April 19, 2001, identical twins Cynthia and Crystal Mikula, 22, of Buckley, Michigan, started a physical altercation on United Flight 857 from San Francisco to Shanghai — pilots diverted to Anchorage; both arrested. Six years earlier, on October 20, 1995, Wall Street investment banker Gerald Finneran, 59, harassed flight attendants on a Buenos Aires→New York flight, was refused further drink service, defecated on a service cart in front of first-class passengers, and smeared feces on the walls. IATA reported 10,854 unruly-passenger cases worldwide in 2015; the FAA counted more than 1,240 in 2024, down sharply from the 2021 peak. The Harvard 3.84x air-rage finding for economy when first class is present strongly suggests the U.S. domestic-airline cabin layout has structural responsibility.

Mass shootings — what the chapter calls the Suicide Killer trend — are the worst entry. Patrick Sherrill, a part-time letter carrier, walked into the Edmond, Oklahoma postal office on August 1, 1986, killed 14 employees, wounded six, and shot himself. The term “going postal” entered print on December 17, 1993, in the St. Petersburg Times. The U.S. has logged more than 154 mass shootings in which a single shooter killed four or more people as of the original publication — with 1,102 people killed, 185 of them children, 20 of them first-graders (The Violence Project). The count has continued to climb; visit The Violence Project database for current figures. In 2024, CDC recorded 44,447 firearm deaths in the U.S. — a rate of 13.1 per 100,000.

The casualization theme runs through all four: the perpetrator is anonymous (urban, vehicular, digital, or postal), the cost externalized to bystanders, and the moral architecture of restraint conspicuously absent. The Hawaiian shirt did not cause the rage. The cultural lubricant that made the Hawaiian shirt acceptable, however, also made the rage culturally cheaper.

The next decade plays out on three vectors that the 2019 chapter could already see.

First, the political incivility cycle has tracked Casual Living closely. The 2016 election yielded a candidate who said: “I could stand in the middle of Fifth Avenue and shoot someone, and I wouldn’t lose any voters.” The 2020 and 2024 election cycles confirmed the new tone. Twitter (now X) became the President’s preferred mass-communication tool; the platform’s 2022 change of ownership, content-moderation rollback, and reinstatement of previously suspended accounts then accelerated the same dynamic across the broader social-media stack. Casual Living has a political wing, and it is not contesting elections quietly.

Second, the rage economy has matured into a distinct policy domain. Everytown’s 2023 finding that the U.S. now averages one road-rage shooting victim every 18 hours sits alongside U.S. manufacturers distributing 9.77 million firearms in 2023 (ATF), down from the pandemic-era peak of 2021–2022. The post-PASPA expansion of legal sports betting (38 states plus D.C. and Puerto Rico) and the 24-state-plus-territories recreational-cannabis count have both contributed to ambient disinhibition in public spaces. The casualization of risk-bearing has tracked the casualization of dress.

Third, the cultural cleanup is institutionalizing. The EU’s Digital Services Act (2024), the U.S. Surgeon General’s warning-label proposal on social media (2024), the Online Safety Act in the UK (2023), and a wave of state-level cyberbullying and revenge-porn statutes constitute the largest regulatory response to online conduct since the early-internet anti-spam era. Whether the response is fast enough is the open question.

The chapter’s closing prediction was that society would “encounter more air- and road-rage perpetrators dressed in Hawaiian shirts and sweatpants hurling epithets at you in the near future.” That prediction has held. Whether it bottoms out in this decade or extends across the next is the next chapter.