Hunter-gatherer Societies May Be More Hierarchical Than They Seem

The Tsimané people of Bolivia believe that humility signifies a worthy person.

David Mercado/Reuters

This metaphor is so overused that it has become a cliché. Hunter-gatherers share their resources equally among their tribes, demonstrating a noble generosity that is often absent in wealthier societies. However, a review of anthropological evidence suggests a more nuanced reality.

“No society exemplifies true equality,” asserts Chris von Ruden, an anthropologist at the University of Richmond in Virginia. What may seem like equality is instead a product of practical or even selfish behaviors.

Some researchers, observing the apparently equitable distribution of resources in traditional subsistence societies, have posited that humans inherently lean towards altruism and equality. For instance, 19th-century philosopher Friedrich Engels, a close associate of Karl Marx and a staunch advocate of Marxism, drew inspiration from reports highlighting the egalitarian nature of traditional cultures.

“Yet, it’s not merely about sharing everything with everyone,” notes von Ruden.

After analyzing the existing data, von Ruden and his colleagues, including Duncan Stebbard Hawkes from Durham University in the UK, contend that some anthropologists mistakenly interpret community wealth equality as an indication of a shared desire for equality. They argue that the pursuit of equality in some traditional societies may stem more from individuals’ desires to avoid constraints on their choices. For instance, the Mbenjele community in the Republic of Congo has a grievance mechanism called mosambo, where individuals vocalize to the entire camp about their perceived rights violations.

“People dislike bullying, coercion, and those who dominate,” remarks Manvir Singh, an anthropologist at UC Davis not involved in the study. He believes that von Ruden and Stebbard-Hawkes accurately highlight that societies focused on individual autonomy may appear egalitarian.

Researchers have observed that along with a desire for autonomy, equality can also emerge from self-serving actions. Instead of altruistically sharing hunting successes, hunters might distribute meat to avoid continued blame. Von Ruden and Stebbard-Hawkes cite evidence of frequent and vocal demands for food sharing among hunters in various foraging cultures. For example, it has been noted that over 34% of daytime conversations among the !Kung people, who inhabit regions in Angola, Botswana, and Namibia, involve complaints about others being stingy.

Additionally, a society characterized by individuals willing to share resources and assist each other isn’t necessarily devoid of social hierarchies. Certain cultures reward those who are more cooperative and community-focused. For example, the Tsimané people of Bolivia hold that humility and kindness are essential traits of worthy individuals. Thus, von Ruden and Stebbard-Hawkes suggest that the equality observed in traditional societies could result from intense competition to be viewed as the fairest among peers.

The study represents “a significant contribution that compiles various ethnographic cases to illustrate the diversity and complexity of egalitarianism,” notes Jerome Lewis, an anthropologist at University College London. He asserts that the 19th-century portrayal of Engels as a “noble savage” residing in an idyllic, principled society is outdated and represents a “very discriminatory and biased perspective.” Just like other human groups, hunter-gatherers compete, argue, and seek resolution for their conflicts.

Lewis emphasizes that traditional subsistence societies worldwide have created “impressive alternatives” to the ways high-income nations structure culture and justice. Some of these societies have thrived for over 50,000 years, offering valuable lessons and fresh perspectives on how we might organize ourselves.

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Source: www.newscientist.com

Astronomers Uncover Remarkably Rare Hierarchical Quadruple Material Systems

A newly identified quadruple star system, referred to as UPM J1040-3551 AABBAB, comprises a pair of cold brown dwarfs along with young red dwarfs.



An artistic depiction of the UPM J1040-3551 system amidst the Milky Way, as seen by the ESA Gaia satellite. On the left, the UPM J1040-3551 AA&AB is portrayed as a distant bright orange dot, showcasing the two M-shaped stars in orbit. Conversely, in the foreground on the right, a pair of cold brown dwarfs – UPM J1040-3551 BA & BB – have been on a long trajectory from each other for decades, collectively orbiting the UPM J1040-3551 AAB in a vast orbit taking over 100,000 years to complete. Image credits: Jiaxin Zhong / Zenghua Zhang.

The UPM J1040-3551 AABBAB system is situated in the constellation Antlia, approximately 82 light-years from Earth.

In this system, AAB denotes the brighter pairs AA and AB, while BAB refers to the more distant sub-components BA and BB.

“The hierarchical structure of this system makes the findings particularly intriguing, as it is essential for maintaining stable orbits over extended periods,” explains Professor Zenghua Zhang from Nanjing University.

“These two objects have orbited individually for decades, but collectively they have circled a common center of mass for more than 100,000 years.”

The two pairs are separated by 1,656 astronomical units (Au), where 1 Au represents the average distance from the Earth to the Sun.

The brighter pair, UPM J1040-3551 AAB, appears orange when viewed in visible wavelengths.

These stars possess a temperature of 3,200 K (approximately 2,900 degrees Celsius) and have a mass about 17% that of the Sun.

With a visual magnitude of 14.6, this pair is roughly 100,000 times dimmer than Polaris, the North Star, when viewed at visible wavelengths.

The fainter pair, UPM J1040-3551 BAB, comprises two cooler brown dwarfs that emit almost no visible light and are about 1,000 times dimmer than the AAB pair in near-infrared wavelengths.

These brown dwarfs are classified as T-type, with temperatures of 820 K (550 degrees Celsius) and 690 K (420 degrees Celsius), respectively.

“This is the first documented case of a quadruple system featuring a pair of T-type brown dwarfs orbiting two stars,” states Dr. Maricruz Gálvez-Ortiz, an astronomer at the Spanish Center for Astronomy.

“This discovery presents a unique opportunity for studying these enigmatic objects.”

“Brown dwarfs, alongside a diverse array of stellar companions, are invaluable for establishing age benchmarks,” comments Hugh Jones, a professor at the University of Hertfordshire.

“The UPM J1040-3551 system is particularly significant, as H-Alpha emissions from the bright pairs suggest that the system is relatively young, estimated to be between 200 and 300 million years old.”

The research team is optimistic that high-resolution imaging techniques could eventually resolve the brown dwarf pairs, facilitating precise measurements of their orbital dynamics and masses.

“This system offers a dual benefit for brown dwarf science,” remarks Adam Burgaster, a professor at the University of California, San Diego.

“It serves as both an age benchmark for calibrating cold atmospheric models and a mass benchmark for validating evolutionary models, provided that we can effectively resolve and track these brown dwarf binaries.”

“The discovery of the UPM J1040-3551 system marks a significant milestone in enhancing our understanding of these elusive objects and the various formation pathways of stellar systems near our Solar System.”

Findings are detailed in a study published in Monthly Notices of the Royal Astronomical Society.

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Zh Zhang et al. 2025. Benchmark Brown Dwarf – I. Blue M2 + T5 Wide Binary and Possible Young People [M4 + M4] + [T7 + T8] Hierarchical rectangles. mnras 542(2): 656-668; doi: 10.1093/mnras/staf895

Source: www.sci.news

Possible Hierarchical Triple System in Kuiper Belt Object Altjira

Altozillaalso known as the 2001 UQ18, is located outside the solar system, 6 billion km (3.7 billion miles), or 44 times the distance between the Earth and the Sun.



This artist’s concept illustrates one of the possible scenarios for Kuiper Belt’s Altjira system. Image credits: NASA/ESA/Joseph Olmsted, Stsci.

“The Hubble images show two Kuiper Belt Objects (KBOs) about 7,600 km (4,700 miles) apart,” says Meianelsen, an astronomer at Brigham Young University and a colleague.

“However, Altjira’s repeated observations of the unique cooperative movement show that the inner object is indeed two bodies very close to each other.

“In small, far-flung objects, we need to discover that the separation between the two inner members of the system is part of the pixels of Hubble’s camera, using non-imaging methods.”

Astronomers gathered data from the Hubble and WM Keck Observatory for 17 years of observation baselines and looked at the trajectory of objects outside the Altjira system.

“Over time, the direction of the trajectory of the outer object changes, indicating that the inner object is either very elongated or in fact one of two separate objects,” says Dr. Dalin Lagoziczin of Brigham Young University.

“The triple system was perfect when putting Hubble data into different modeling scenarios,” Nelsen added.

“Other possibilities are that the inner object is a contact binary, so close that two separate bodies touch each other, or in fact, oddly flat as pancakes.”

Of the 40 identified binary objects in the Kuiper belt, of another system, Lempoit is known to be triple.

“Now, Altjira and Lempo are likely triples, so they are more likely to be looking for a population of three-body systems formed by the same situation, rather than a strange ball,” the astronomer said.

“But building that evidence requires time and repeated observation.”

The only Kuiper Belt objects explored in detail are PL Pun and the small object Arrocos that NASA’s New Horizons mission visited in 2015 and 2019, respectively.

New Horizons showed that Arrokoth is a contact binary. This means that in the case of KBO, two objects that have moved close to each other are currently touched or merged, often in the form of peanuts.

“Altozilla is the “cous” of Arokos, a member of the Kuiper Belt Objects of the same group,” Dr. Lagozin said.

“The Altjira is 10 times the Arocos, which is 200 km (124 miles) wide.”

“There is no mission that Altozilla plans to fly to get Arrocos level details, but there are other upcoming opportunities to further study the intriguing system,” Nelsen said.

“Altozilla is entering the season of the eclipse, where the outer body passes in front of the central body.”

“This will continue for the next 10 years and give scientists a great opportunity to learn more about it.”

Team’s paper It was published in Journal of Planetary Science.

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Maia A. Nelsen et al. 2025. Beyond the point square. IV. The Transneptinian object Altjira is a hierarchical triple, possibly discovered by non-kipler movements. planet. SCI. j 6, 53; doi:10.3847/psj/ad864d

Source: www.sci.news