Pernicious polarization is an antagonistic Us versus Them division, where the other group is perceived as an existential threat. It is often intertwined with the erosion of democratic norms and institutions. Although studies on polarization abound, there are still some blind spots to be filled. Our contribution is the focus on the mesolevel of civil society and the theoretical development of (de)polarization mechanisms at this level. Empirically, we study think tanks, a special type of civil society organization, in the context of democratic backsliding in Hungary and Poland. The analysis is based on 53 interviews with Hungarian and Polish think tankers conducted between 2020 and 2022. We contend that through a shift in perceptions of Us, Them, and the middle ground, think tanks contribute to both polarization and depolarization. Rather than being passive receptors of polarization dynamics, we showcase think tanks’ agentic roles as they emerge through these three mechanisms and through think tanks resorting to specific patterns of discourse and interactions.

Invasive species threaten biodiversity on a global scale. The success of invasions depends on the species' adaptation to the different environmental conditions of new territories. Studies show that invasive insects present evolutionary changes in wing morphology in areas they are introduced to in response to abiotic conditions. In the last decade, the Asian Drosophila nasuta fly invaded and spread widely throughout Brazil. This insect has preferences for conserved environments and is related to the likely reduction in the abundance of native drosophilids in the Atlantic Forest. Ecological niche modelling analyses showed that rainfall and temperature are the main factors which delimit the geographic distribution of this species. Herein, we verified the existence of significant differences in the wing sizes of D. nasuta in Brazil and evaluated the influence of abiotic factors (rainfall and temperature) on the observed patterns. We conducted 11 measurements on the right-side wings of 240 D. nasuta males collected in the Amazon Forest, Caatinga, Cerrado and Atlantic Forest. Statistical analyses revealed the existence of two groups: one with larger wings, which brought together samples from locations with the lowest temperatures; and one with smaller wings, which corresponded to places with a hotter climate. One explanation for this result is the fact that large wings favour greater heat capture by flies in colder climates, increasing their survival chances in these environments. These rapid evolutionary changes in D. nasuta in this first decade of invasion in Brazil reveal the enormous adaptive potential of this species in this megadiverse country.

Few studies investigated the association between Mediterranean-DASH Intervention for Neurodegenerative Delay (MIND) diet and metabolic health status, particularly among adolescents. The present study was designed to investigate the association of MIND diet with metabolic health status in Iranian adolescents with overweight/obesity. This cross-sectional study was done among 203 adolescents with overweight/obesity (12–18 years) in Isfahan, Iran. A validated FFQ was applied to collect dietary intakes. Anthropometric indices and blood pressure were also measured by standard procedures. Fasting blood samples were obtained to determine serum insulin, glucose and lipid profile. To categorise participants as being with metabolically healthy overweight/obesity (MHO) or metabolically unhealthy overweight/obesity (MUO), two methods including International Diabetes Federation (IDF) criteria and IDF plus Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) were applied. Participants had a mean age of 13·98 years and 50·2 % of them were girls. In fully adjusted models, participants with highest MIND diet adherence had lower odds of MUO status based on IDF (OR = 0·20; 95 % CI 0·08, 0·51) and IDF/HOMA-IR (OR = 0·22; 95 % CI 0·08, 0·59) criteria. Stratified analyses revealed that this association was stronger among girls and was only significant among individuals with overweight. An inverse association was also found between MIND diet score and odds of hyperglycaemia and insulin resistance (IR). Higher MIND diet adherence was associated with lower odds MUO in adolescents with overweight/obesity. Inverse associations were also found between MIND diet and odds of hyperglycaemia and IR. Future longitudinal prospective studies are necessary to confirm our results.

In the social, historical, and political context of Xi Jinping’s China, particular forms of racialization and racial capitalism have emerged in Altay Prefecture, the homeland of ethnic Kazakhs on China’s northwest border. This study examines the husbandry industry in Altay Prefecture to elucidate how Xi’s China has built a mode of racial capitalism through the management of Kazakh land, ethnicity, and culture. Within the framework of a case study, I employ document collection and participant observation methods to gather data that are then interpreted through critical policy analysis. The research shows that Kazakhs have been racialized based on their mobile pastoral traditions, enslaved in the “debt economy,” and exploited through husbandry policies and programs. The particular ways in which husbandry has been restructured and assimilated into Chinese industrial production chains exploit and reproduce the Kazakh-Han hierarchy and segregation. This close look at racial capitalism in Altay sheds light on the operations of Xi’s ecological civilization and war on poverty policies in an ethnic minority border region and discusses how they align with the broader geopolitics of the Belt and Road Initiative in Central Asia and Eastern Europe.

In this article, we analyze the influence of the colonial policy of the Russian Empire and the Soviet Union on Ukrainian art-historical writing. As we shall reveal, the mechanisms of knowledge production created during that period continued to operate after the Declaration of Independence of Ukraine in 1991. The limitations that were imposed on the art-historical community, which can be regarded as colonial, shaped the crucial narratives (of the “triune nation”) and dictated the thematic scope of Ukrainian scholarship. The new notion of “mysteztvoznavstvo,” introduced in 1937 instead of the previously established Theory and History of Art, eventually led to a profound rift between Soviet Russian and Ukrainian scholarship and the Western world more generally. “Mysteztvoznavstvo” was supposed to be an umbrella term for art history, theory, and art criticism but ended up doing a disservice to each domain. Art theory in Ukraine was virtually nonexistent, whereas art history was mixed with art criticism, resulting in writing that did not meet widely accepted academic standards. This led to the isolation of Ukrainian scholars, who were confined to the Russian-speaking community and had very limited access to foreign scholarship. We also analyze the decolonization processes in the history of Ukrainian art prompted by the invasion of the Russian Federation into Ukraine after 2013, such as The Revolution of Dignity and “decommunization.” We argue that horizontal art history and decolonial approaches cannot adequately be applied if colonial tools are still used by the discipline. Epistemic decolonization can only be achieved after challenging the standards of “mysteztvoznavstvo” and, thus, by dividing art studies into three separate domains: art history, art theory, and art criticism, as each discipline has its own goals and methods.

When do political transitions lead to greater inclusion for groups historically excluded from power? Scholars and policymakers often assume the answer is simple: a transition will result in more inclusion when it ends in democracy. Yet this answer is incomplete at best, since many democracies systematically exclude women, particular ethnic groups, or lower economic classes from power. Using data on political transitions around the world from 1945 to 2014, this study shows that a political transition’s initiating force critically shapes post-transition political inclusion. When transitions are initiated through unarmed civil resistance campaigns they achieve greater advances in inclusion relative to other types of transition. We propose three mechanisms to explain this effect: civil resistance leads to greater continued mobilization and civic activism among the historically excluded, provides greater opportunities for elites from historically excluded groups to rise to positions of leadership in new regimes, and forges more pluralistic norms of political behavior.

The gut microbiome is impacted by certain types of dietary fibre. However, the type, duration and dose needed to elicit gut microbial changes and whether these changes also influence microbial metabolites remain unclear. This study investigated the effects of supplementing healthy participants with two types of non-digestible carbohydrates (resistant starch (RS) and polydextrose (PD)) on the stool microbiota and microbial metabolite concentrations in plasma, stool and urine, as secondary outcomes in the Dietary Intervention Stem Cells and Colorectal Cancer (DISC) Study. The DISC study was a double-blind, randomised controlled trial that supplemented healthy participants with RS and/or PD or placebo for 50 d in a 2 × 2 factorial design. DNA was extracted from stool samples collected pre- and post-intervention, and V4 16S rRNA gene sequencing was used to profile the gut microbiota. Metabolite concentrations were measured in stool, plasma and urine by high-performance liquid chromatography. A total of fifty-eight participants with paired samples available were included. After 50 d, no effects of RS or PD were detected on composition of the gut microbiota diversity (alpha- and beta-diversity), on genus relative abundance or on metabolite concentrations. However, Drichlet’s multinomial mixture clustering-based approach suggests that some participants changed microbial enterotype post-intervention. The gut microbiota and fecal, plasma and urinary microbial metabolites were stable in response to a 50-d fibre intervention in middle-aged adults. Larger and longer studies, including those which explore the effects of specific fibre sub-types, may be required to determine the relationships between fibre intake, the gut microbiome and host health.

Until now the research has mainly examined visible abusive supervision, like aggression and violence, but it’s unclear how subtle forms, such as gaslighting, impact victims. Gaslighting, an emotionally and psychologically manipulative form of abuse, is an increasingly prevalent phenomenon in contemporary times. Based on the conservation of resources theory, we examined how supervisory gaslighting affects job embeddedness directly and indirectly through work motivation. We also explored how coworker support moderates the gaslighting-work motivation link. Structural equation modeling was used to assess the two-wave time-lagged data from 337 Chinese hotel employees. The results show the negative direct and indirect effects of gaslighting, and coworker support moderates the negative link between gaslighting and work motivation. Hotel organizations should exercise caution when hiring supervisors to prevent gaslighting, which can undermine employee motivation and job embeddedness. This study also recommends raising awareness among employees to speak out against supervisors’ gaslighting behavior.