Nature Human Behaviour最新文献

Narratives about the motivations and conditions for mass violence as a persistent feature of conflict throughout human history have evolved in complexity and materiality. Victims of these events are key for understanding the evolution and transformative power of violent behaviour as it developed from simple intergroup conflict to more strategic mass violence. Here we present the results of a bioarchaeological study of 77 and biomolecular analysis of 25 individuals from a ninth-century BCE mass grave from Gomolava in the Carpathian Basin, Southeast Europe. The site is located at the interface of complex sociospatial relations, divergent cultural traditions and values, and competing ideologies of landscape use. We show that excessive lethal violence enacted mostly on women and children suggests a selective demographic bias. The people buried together shared few, even distant, genetic relationships, and so their killing presents striking evidence for an episode of cross-regional conflict and an underlying aggressive shift in power, violence and gender relations in the region. Gomolava provides evidence consistent with deliberate annihilation of select sections of a regional population as a motivation for mass violence behaviour in later prehistoric Europe. It also shines new light on the socioeconomic agency and importance of women and young individuals in later European prehistory.

Animal domestication and development of pastoralism in southwest Asia revolutionized human subsistence strategies. Various centres of ruminant domestication and diffusion routes of agropastoralism have been identified. The area between the northern and central Zagros Mountains on the Iranian Plateau is a cradle for goat domestication and eastward spread of agropastoralism. However, the early exploitation of ruminant milk by pastoral communities in the Zagros remains insufficiently studied. Here we show residues of caprine dairy products that were detected from the analysis of lipid residues in pottery vessels and protein residues in human dental calculus. These results, combined with the faunal spectra and radiocarbon analyses directly on the dairy residues, show that sheep and goat dairy products were widely exploited in the Zagros from the seventh millennium BC. This pattern parallels the contemporaneous exploitation of cattle milk in Anatolia. Neolithic communities in both regions reveal similarly complex dynamics of early ruminant milk use, marking the emergence of independent yet synchronous trajectories in the diffusion of agropastoral lifeways.

Language barriers and translation costs are persistent obstacles to communication and have particularly pronounced economic impacts in technical domains. Here we provide causal evidence on the effects of language barriers on the speed and extent of knowledge diffusion by exploiting a change in US patent policy that resulted in earlier disclosure of English-language technical knowledge from Japan. Using a targeted sample of 2,770 citations from US-based inventors to Japanese inventions, we find that language barriers accounted for almost half the diffusion lag of Japan-originating knowledge to US-based inventors, relative to Japan-based inventors. This acceleration is significant only for firms with limited ability to translate (small research and development scale, or little involvement in the Japanese market) and is more pronounced for the diffusion of high-quality inventions, suggesting difficulties in quality-targeted translation. Thus, early publication of patent applications provides a substantial public good for cumulative innovation through accelerated access to translated foreign patents.

There are increasing calls for economic assistance in the form of social safety nets (SSNs) to be designed and implemented to promote women's economic inclusion and agency, contributing to closing gender disparities globally. Here we investigate the extent to which SSNs affect women's economic achievements and agency through a systematic review and meta-analysis of randomized controlled trials implemented in low- and middle-income countries. We searched six databases utilizing search strings in English, French and Spanish through December 2024. Studies were assessed for risk of bias using an adapted version of the Joanna Briggs Institute critical appraisal tool. Our sample includes 1,307 effect sizes from 93 studies, representing 218,828 women across 45 low- and middle-income countries. Using robust variance estimation meta-analysis, we show significant overall pooled effects (Hedges' g = 0.107, P < 0.001, 95% confidence interval (CI) 0.085-0.129), driven by increases in economic achievements (productive work, savings, assets and expenditures) and agency (voice, autonomy and decision-making). We find significant treatment effects for unconditional cash transfers (Hedges' g = 0.128, P < 0.001, 95% CI 0.097 to 0.159), social care services (Hedges' g = 0.122, P < 0.001, 95% CI 0.071 to 0.174), asset transfers (Hedges' g = 0.115, P < 0.001, 95% CI 0.071 to 0.160) and public work programmes (Hedges' g = 0.127, P = 0.031, 95% CI 0.015 to 0.239). We find comparatively smaller effects for conditional cash transfers (Hedges' g = 0.059, P = 0.019, 95% CI 0.011 to 0.108) and found no evidence of effects for in-kind transfers. SSNs can empower women economically and socially; however, limitations and evidence gaps remain, including the need for further rigorous testing of design and operational components, the role of contextual factors and cost-benefit analysis with a gender lens.