Hitler, despite suffering from chronic flatulence, was a vegetarian and in pretty good health at the time he orchestrated the slaughter of millions of innocent people. Romanian dictator Nicolae Ceaușescu was a nonsmoker and cardio enthusiast when he launched mass murdering sprees of his own. Surely, there are modern misogynists who can run a six-minute mile and Islamophobes with low body fat percentages. But should we consider a person healthy if he or she nurtures feelings of intense hatred? UCLA Medical Professor Dr. Robert H. Brook doesn’t think so.

This past Valentine’s Day, Brook addressed the insidious role hate plays in health, arguing in a JAMA article that medical professionals should play a larger role in combatting intolerance. Brook, who is also a Distinguished Chair in Health Care Services at the RAND Corporation, believes medical professionals have a responsibility to reduce intolerance, along with the necessary widespread respect to make a real difference.


“It is time to expand the WHO’s definition of health to include acceptance and tolerance,” Brook writes, “No community or nation should be considered healthy if hatred is pervasive. Nor should any individual be considered healthy if he or she is intolerant.”

[quote position=”full” is_quote=”true”]No community or nation should be considered healthy if hatred is pervasive.[/quote]

What may seem like a radical idea at first glance actually falls in line with medicine’s broadening scope. When Brook got his start in the medical field in the 1960s, most people viewed doctors as fixers of broken bones and nemeses of pneumonia. Fast-forward half a century, and doctors ask patients about loneliness as routinely as they take temperatures. In a relatively brief span of time, medicine has evolved to encompass preventative care, while also recognizing the complex factors that can influence an individual’s health.

There’s no time like the present

“Now that Trump is president, I’m going to shoot you and all the blacks I can find.” That’s what one 12-year-old black student had the misfortune of hearing from a classmate the day after Donald Trump won the presidency. Sadly, her experience was just one of nearly 900 hate-fueled incidents reported to the Southern Poverty Law Center in the first 10 days following Trump’s election night win. It’s been three months since that initial surge and instances of hate speech have yet to return to pre-election levels.

Clearly, America has a problem with hatred. Rethinking how we measure and improve national health will be necessary if the United States hopes to keep up with other developed countries. A recent study led by Imperial College London scientists and the World Health Organization showed that Americans are falling behind when it comes to improving average life expectancy. In fact, researchers expect the United States to see some of the smallest lifespan gains compared to those of other high-income countries. The study’s writers fault the United State’s lack of universal health care, high maternal death rates, and obesity for our stagnant life spans. But what if prejudice also plays a role?

There’s plenty of evidence to support the idea that anger can negatively affect your health. But bearing the weight of toxic emotions barely scratches the surface of intolerance’s destructive (and typically unchecked) reach. In his article, Brook offers up a few eerily relevant examples of why this is a problem. For instance, a doctor might examine a woman and deem her perfectly healthy, only to hear about her shooting dozens of people weeks later. Which begs the question, what if Omar Mateen had communicated with his general physician a desire to harm gay people? Or if Dylann Roof had mentioned his hatred of black people during an annual checkup? Currently, there is no standardized training for handling intolerance among patients.

Brook believes adding just a few questions to a routine medical exam could help ignite a discussion about intolerance and potentially prevent terror attacks as a result. Clinical psychologist Dr. Sonja Raciti agrees, suggesting doctors ask patients if they feel safe within their communities, families, and relationships, as well as asking if they regularly feel angry. She explains that, while doctors have a limited amount of time to interact with their patients, “a quick question measuring anger/hatred would allow both physicians and mental health practitioners to focus briefly on intolerance.” From there, patients identified as intolerant could be referred to specialists in the same way practitioners refer depressed patients to qualified psychiatrists. Even if patients lie about their feelings, asking the question reaffirms the potentially life-threatening consequences of intolerant behavior.

How do we treat it?

Brook says the first step would be to find a way to measure intolerance accurately and quickly. From there, researchers would need to start testing interventions that might work. Only after years of dedicated research could the American Psychiatric Association consider adding intolerance to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). Originally published in 1952, the manual has been updated a total of five times with the most recent update published in 2013. Among the 15 disorders added to the list, caffeine withdrawal syndrome and hoarding disorder stirred up some controversy for supposedly diluting the significance of a clinical disorder. Undoubtedly, intolerance would ruffle feathers as well.

While Brook doesn’t specifically mention the DSM-5 in his article, Raciti says it’s a necessary part of successfully treating psychiatric disorders. Though that doesn’t mean the APA always gets it right. Raciti tells GOOD,

“There are certain instances where the DSM-5 has failed to include diagnoses which clinicians see on a routine basis. A good example for this: Only gambling addiction is included in the DSM-5 as a process addiction. However, sex, gaming, internet, and food addictions are widely recognized by a majority of addiction experts and treatment facilities … The difficulty then lies with billing for a disorder without having the appropriate DSM-5 code.”

She adds that politically sensitive conditions face additional scrutiny. By that measure, we can safely assume intolerance won’t be officially recognized any time soon.

In the meantime, Brook says one very simple strategy might involve placing signs at health facilities informing patients that intolerance impedes optimal health, but trained professionals are available to discuss more. The idea is simple, but it could have profound implications we have yet to discover. What we do know is that doctors have a unique opportunity as highly respected authority figures to influence their patients and the general populace for the better.

Looking ahead

A few decades from now, Brook hopes treating intolerance will seem as obvious as treating depression or anxiety. And while doctors may not be able to root out intolerance entirely, they could affect enough people to trigger a seismic shift. As Brook notes, the flu vaccine only works about half of the time (according to the Centers for Disease Control and Prevention), but doctors continue advising everyone to get the shot each fall. “We won’t succeed with everybody,” says Brook, “but we may succeed with enough. We may move the needle enough that the world becomes a much more pleasant place in which to live.”

[quote position=”right” is_quote=”true”]We really do need a world in which … we don’t go around killing each other because people are different from us.[/quote]

While there are obvious complexities associated with intolerance and countless challenges for those trying to eradicate it, Brook says we shouldn’t let that deter us. He predicts the medical profession could potentially have a bigger impact on global health by focusing on intolerance as opposed to more conventional, chronic diseases. “Even though we’ve got to solve those problems as well,” he explains, “we really do need a world in which, when we solve all those problems, we don’t go around killing each other because people are different from us.” Put this way, the case for diagnosing intolerance becomes inordinately simple. Technological advances, whether they eliminate disease or extend our lives by hundreds of years, still won’t protect us from the threat we pose to ourselves.

So far, Brook says the response to his article has been mixed. While some have expressed excitement at the thought of expanding physicians’ roles, others would rather see doctors stick to curing pneumonia and fixing broken bones. But the detractors won’t stop him from advocating for change in the medical profession. “It could be a fantasy or it could be something that actually will work,” he says, “but we have to try something.”

  • What does the appendix do? Biologists explain the complicated evolution of this inconvenient organ
    Photo credit: Sebastian Kaulitzki/Science Photo Library via Getty ImagesMost people get acquainted with their appendix when it’s inflamed and about to rupture.
    ,

    What does the appendix do? Biologists explain the complicated evolution of this inconvenient organ

    It may be inconvenient, but the appendix is no evolutionary mistake.

    Most people know only two things about the appendix: You don’t need it – and if it bursts, you need surgery fast.

    That basic story traces back at least to Charles Darwin, the English naturalist who developed the theory of natural selection. In “The Descent of Man,” he described the appendix as a vestige: a leftover from plant-eating ancestors with larger digestive organs. For more than a century, that interpretation shaped both textbook and casual medical wisdom.

    But the evolutionary story of the appendix turns out to be much more complicated.

    Along with our colleague Helene M. Hartman, a student preparing for a career in health care, we combined our expertise in behavioral ecologybiology and history to review the scientific literature on the appendix, expecting a simple answer.

    Instead, we found an organ that evolution kept reinventing, more interesting than most people imagine.

    How did the appendix evolve?

    The appendix is a small pouch branching off the first section of the large intestine. Its shape and structure vary widely across species – a clue that evolution may have tinkered with it more than once.

    Some species, including certain primates such as humans and great apes, have a long, cylindrical appendix. In others, including several marsupials such as wombats and koalas, the appendix appears shorter or more funnel-shaped. Still others, including some rodents and rabbits, have differently proportioned or branching structures. This structural diversity suggests that evolution has modified the organ under different ecological conditions.

    Diagram of a segment of the small intestine with fingers of the appendix oriented in various degrees
    The appendix can be oriented in the body in multiple ways. Mikael Häggström, M.D./Wikimedia Commons

    That suspicion is supported by evolutionary analyses. Comparative studies show that an appendix-like structure evolved independently in at least three distinct lineages of mammals – marsupials, primates and glires, a group that includes rodents and rabbits. A broader evolutionary survey found that the appendix evolved separately at least 32 times across 361 mammalian species.

    When a trait evolves repeatedly and independently, biologists call this convergent evolution. Convergence does not mean a structure is indispensable. But it does suggest that, under certain environmental conditions, having that structure provided a consistent enough advantage for evolution to favor it again and again.

    In other words, the appendix is unlikely to be a useless evolutionary accident.

    What does the appendix do?

    The appendix supports the immune system. It contains gut-associated lymphoid tissue – immune cells embedded in the intestinal wall that help monitor microbial activity in the gut. In early life, this tissue exposes developing immune cells to intestinal microbes, helping the body learn to distinguish between harmless symbionts and harmful pathogens.

    The appendix is particularly rich in structures called lymphoid follicles during childhood and adolescence, when the immune system is still maturing. These immune components participate in mucosal immunity, which helps regulate microbial populations along the intestinal lining and other mucosal surfaces. Lymphoid follicles produce antibodies, such as immunoglobulin A, to neutralize pathogens.

    Researchers have also proposed that the appendix acts as a microbial refuge. Some have suggested that biofilms – thin, structured communities of bacteria – line the appendix. During severe gastrointestinal infections that flush much of the gut microbiome from the colon, beneficial bacteria sheltered within these biofilms may survive and help repopulate the intestine afterward. Those beneficial microbes assist with digestioncompete with pathogens and interact with the immune system in ways that reduce inflammation and promote recovery.

    These hypotheses motivated a question our team explored: If the appendix helps preserve microbial stability, could removing it subtly affect reproductive fitness?

    Older clinical concerns suggested that appendicitis or appendectomy might impair fertility by causing inflammation and scarring – known as tubal adhesions – in the fallopian tubes. Such scarring could physically obstruct the egg’s passage to the uterus. But several large studies have since found no decrease in fertility after appendectomy – in some cases, researchers found a small increase in pregnancy rates.

    The appendix appears to have multiple functions, including immune and microbial ones. Affecting fertility, however, does not seem to be one of them.

    Evolutionary importance and modern life

    While the appendix has an interesting past, with evolution continually reinventing it, its modern importance is modest at best. Darwin underestimated the organ’s history, but his instinct wasn’t far off in the medical present: Some parts of human biology mattered more in the environments people evolved in than in the lives they lead today.

    Early humans lived in environments with little sanitation and strong social contact – perfect conditions for outbreaks of pathogens that cause diarrhea. An appendix that quickly restored the microbiome after infection could significantly improve survival. But over the past century, clean water, improved sanitation and antibiotics have sharply reduced deaths from diarrheal diseases in high-income countries.

    As a result, the evolutionary pressures that once favored the appendix have largely disappeared. Meanwhile, the medical risks of keeping the appendix – most notably appendicitis – remain. Modern surgery typically treats an infected appendix by removing it. A structure that was once a global evolutionary advantage is now more of a medical liability.

    This mismatch between past adaptations and present environments illustrates a core principle in evolutionary medicine: Evolution optimizes for survival and reproduction in ancestral environments, not for health, comfort or longevity in modern ones.

    Evolution operates at the level of populations over generations, favoring traits that increase average reproductive success, even if those traits sometimes harm individuals. Medicine works the other way around – helping individuals thrive in the present world rather than survive the past one.

    The appendix is not an IKEA spare part included “just in case,” but neither is it essential today. Human biology has many traits that were once beneficial, now marginal – and understanding them allows medicine to make better modern decisions.

    This article originally appeared on The Conversation. You can read it here.

  • Pregnant mom asks for first-class seats. The internet couldn’t wait to deliver a reality check.
    Photo credit: CanvaA passenger sits in first class
    ,

    Pregnant mom asks for first-class seats. The internet couldn’t wait to deliver a reality check.

    A pregnant mom asked if front-row passengers should move so she could sit with her toddler on a flight. The internet wasn’t on her side.

    Flying with a young child isn’t always smooth sailing, especially when it comes to seating arrangements. A soon-to-be mother, known online as Deekaytwo, found herself turning to the internet for advice after wondering if it was fair to ask front-row passengers to swap seats so she could sit with her toddler. But the reaction she got online was anything but supportive.

    On Mumsnet, she shared the details of her travel situation: “We’ve got row 7A and C seats booked on our upcoming four-hour flight. The middle seat is blocked off, and we always use it for our nearly 2-year-old son after take-off and before landing.”

    airplane etiquette, flying with kids, seat swap debate, toddler travel, viral parenting story
    A young toddler plays with the back of an airplane seat. Photo credit: Canva

    She normally books front-row spots for ease, but those were unavailable this time. Now seated farther back, she worried about managing the flight with her young child. “According to the seat map, 1C and F are empty (typically reserved for gold members), and these usually open up just before the flight,” she explained.

    The thought of moving closer to the front lingered on her mind. To make it work, though, one of the passengers in the prime 1A or 1D seats would need to trade places so her family could sit together. “Am I being unreasonable to move us to the empty seats in the front row and hope/expect 1A or 1D to move so we can sit together? They’d still have their aisle/window and avoid sitting next to a baby, so I think it’s a win-win,” she wrote, pointing out she was five months pregnant.

    airplane etiquette, flying with kids, seat swap debate, toddler travel, viral parenting story
    Image of the seats in question. Photo credit: Mumsnet |u00a0Deekaytwo

    She even laid out two clear options for the forum to consider: “Stay in your current seats and let the fancy gold members keep the empty seat next to them!” or “It doesn’t make any difference to them and will make your journey more comfortable, probably everyone else’s too, as her son will have more room to be contained.” With more than 200 replies pouring in, the overwhelming response was that her expectations weren’t fair.

    The community didn’t hold back. “No, you cannot expect someone to move for your convenience. Book seats that work for you and assume that any that are already booked will remain occupied by someone else,” wrote user BreakfastAtMimis.

    airplane etiquette, flying with kids, seat swap debate, toddler travel, viral parenting story
    A mom sits with her toddler on an airplane. Photo credit: Canva

    Another, HoHoHoliday, chimed in, “Don’t set out to make someone else feel annoyed. Choose seats that are already available for you to sit next to each other. It’s only a four-hour flight, you should be able to manage your own child for that time.” ThanKyoualMee added, “Only book it if you’re prepared to travel in the seats you’ve booked! I wouldn’t book on the provision you need someone to swap with you, personally, I’d keep your current seats sat together.”

    This article originally appeared two years ago. It has been updated.

  • Just thinking about tequila, whiskey or wine shifts your mindset – new research
    Photo credit: Arturo Peña Romano Medina/E+ via Getty ImagesMost celebrations in the U.S. involve alcohol, in large part due to marketing and advertising.
    ,

    Just thinking about tequila, whiskey or wine shifts your mindset – new research

    Different drinks cue different identities before a sip is taken.

    Thinking about certain types of alcohol can alter your mood and trigger certain mindsets, especially among young consumers. For instance, tequila calls up a party mindset, whiskey activates a masculine mindset, and wine primes a sophistication mindset.

    Those are the key takeaways of a new study my team and I published in the journal Young Consumers.

    We carried out four studies with 429 total participants to examine the cultural themes and moods people associate with different types of alcohol.

    We conducted two preliminary studies to understand how people think about different types of alcohol. In the first study, participants answered open-ended questions, and in the second they completed a word-association task. These studies helped us identify common cultural associations, which we call “learned associations,” or ideas people develop through experience and cultural exposure.

    We used these associations to create questions about alcohol-related mindsets. Participants rated how much they felt different qualities when thinking about a randomly assigned type of alcohol in response to the prompt, “I feel ___ when thinking about this type of alcohol.” For example, the sophisticated mindset included sophisticated, elegant, classy, formal and fancy; the masculinity mindset included masculine, tough, confident, manly and strong; and the party mindset included energetic, outgoing, fun, like partying and like celebrating.

    Then we conducted two experiments where participants were randomly assigned to think about either wine, whiskey or tequila and respond to the mindset questions, allowing us to test whether different types of alcohol evoke different associations.

    Importantly, participants did not consume alcohol, allowing us to isolate the learned associations these drinks evoke, separate from alcohol’s physiological effects.

    Clear patterns emerged. Tequila was frequently associated with words like fun, wild, celebration and party. Whiskey elicited terms such as strong, rugged, confident and masculine. Wine, by contrast, was associated with elegance, class, refinement and sophistication.

    These findings show that alcohol can function as a “symbolic cue.” In other words, the mindsets people associate with different drinks appear to originate from learned associations rather than from intoxication itself.

    Why it matters

    More than half of the U.S. adult population consumes alcohol: 54% in 2025. This is the lowest level recorded since Gallup began tracking the drinking habits of adults in the U.S. in 1939, and it marks a decline from 1997-2023, when over 60% of adults reported drinking.

    Some drink to enhance experiences, while others drink for enjoyment, socializing or even escapism. For others, drinking may become compulsive or difficult to control, defined as an alcohol use disorder.

    Research increasingly shows that even moderate drinking can carry health risks, including higher risks of several cancers.

    A considerable amount of research on alcohol has explored what happens as a result of drinking. Studies have found that people become uninhibited and make risky decisions when they drink. Other researchers have found that people pick up ideas and habits about drinking from the world around them and that advertising can influence what, when and how young people drink.

    Fans of the popular sitcom “How I Met Your Mother” might recall an episode titled ‘The Perfect Cocktail.“ In this episode, different alcoholic beverages reflect the personalities of Marshall (Jason Segel) and Barney (Neil Patrick Harris). It’s funny and engaging, but what if there’s a real psychological basis for these associations?

    Such learned associations have not been thoroughly studied – in particular, it’s unknown whether they can activate distinct drinking mindsets even without actual consumption.

    One reason why this is important is that even though Gen Zers drink less alcohol than previous generations, they are still exposed to alcohol-related media and cultural cues. Understanding these psychological cues may help explain how alcohol-related social norms and expectations develop and influence drinking decisions.

    What’s next

    Learned associations for different alcoholic drinks can influence how people feel, which in turn might shape their intentions, choices and social expectations. For example, if thinking about tequila prompts a “party” mindset, it could influence how a person plans their evening and what choices they make.

    A better understanding of these associations could help public health campaigns promote moderation and responsible drinking, such as pacing drinks, staying hydrated and avoiding overconsumption. Future research could examine how these associations form in different social contexts, how they vary across age groups or cultures, and how interventions might shift them to further reduce risky behaviors and encourage safer, more responsible alcohol consumption.

    The Research Brief is a short take on interesting academic work.

    This article originally appeared on The Conversation. You can read it here.

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