Although theory suggests individuals are more willing to incur a personal cost to benefit
ingroup members, compared to outgroup members, there is inconsistent evidence in support …

We review psychological research on intergroup conflict. First, we outline psychological
perspectives on forms and functions of groups. Second, we present the most influential …

Human cooperation is highly unusual. We live in large groups composed mostly of non-
relatives. Evolutionists have proposed a number of explanations for this pattern, including …

Humans live in, rely on, and contribute to groups. Evolution may have biologically prepared
them to quickly identify others as belonging to the in-group (vs. not), to decode emotional …

Highlights•Overviews social class differences in interpersonal attention and prosocial
emotion.•Reviews evidence linking lower social class to increased prosocial …

The COVID-19 pandemic led to lockdowns in countries across the world, changing the lives
of billions of people. The United Kingdom's first national lockdown, for example, restricted …

The rise in White nationalist ideology in America is one of the pressing issues of our times. In
this article, we make the case that White nationalists both extol the talents and virtues of …

Conflict can profoundly affect individuals and their groups. Oftentimes, conflict involves a
clash between one side seeking change and increased gains through victory and the other …

Recent theorizing has suggested that awe is a collective emotion, as research has
demonstrated a clear link between experiencing awe and behaving prosocially. The present …

During close interactions with fellow group members, humans look into one another's eyes,
follow gaze, and quickly grasp emotion signals. The eye-catching morphology of human …