Coalitional psychology and the evolution of nationalistic cultures.

The commentaries addressed various aspects of our account of historical myths. We respond by clarifying the evolutionary theory of coalitional psychology that underlies our claims (R1). This addresses concerns about the role of fitness interdependence in large groups (R2), cultural transmission processes (R3), alternative routes to nation-building (R4) and the role of proximal mechanisms (R5).

Facebook increases political knowledge, reduces well-being and informational treatments do little to help.

Nearly three billion people actively use Facebook, making it the largest social media platform in the world. Previous research shows that the social media platform reduces users' happiness, while increasing political knowledge. It also may increase partisan polarization.

Inconsistent and very weak evidence for a direct association between childhood personality and adult ideology.

Objective: We add depth and breadth to the study of the childhood personality-adult ideology link with additional data, measures, and measurement approaches.

Background: Past research in (political) psychology has put forward that individual differences in psychological needs shape ideology. Most evidence supporting this claim is cross-sectional.

Science interrupted .

Recent research contends that the behavioral immune system, operating largely outside conscious awareness, motivates individuals to exhibit higher levels of prejudice toward unfamiliar out-groups. This research finds that individual variance in disgust sensitivity correlates with support for political policies that facilitate the avoidance of out-groups. We were interested in developing less intrusive indicators of disgust sensitivity via olfactory measures (i.

Ideology and compliance with health guidelines during the COVID-19 pandemic: A comparative perspective.

Objective: We measure the prevalence of noncompliance with public health guidelines in the COVID-19 pandemic and examine how it is shaped by political ideology across countries.

Methods: A list experiment of noncompliance and a multi-item scale of health-related behaviors were embedded in a comparative survey of 11,000 respondents in nine OCED countries. We conduct a statistical analysis of the list experiment capturing degrees of noncompliance with social distancing rules and estimate ideological effect heterogeneity.

Two-dimensional Ising transition through a technique from two-state opinion-dynamics models.

The Ising ferromagnetic model on a square lattice is revisited using the Galam unifying frame (GUF), set to investigate two-state opinion-dynamics models. When combined with Metropolis dynamics, an unexpected intermediate "dis/order" regime is found with the coexistence of two attractors associated, respectively, to an ordered and a disordered phases. The basin of attraction of initial conditions for the disordered phase attractor starts from zero size at a first critical temperature T(c1) to embody the total landscape of initial conditions at a second critical temperature T(c2), with T(c1)≈1.

Historical perspectives on parental investment and childbearing.

This article provides some historical perspectives on parental investment and childbearing. Scholars are debating whether parents always loved and nurtured their children. The historical record provides some support for both sides.