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 …

ABSTRACT I describe an integrative social‐evolutionary model for the adaptive significance
of the human oxytocinergic system. The model is based on a role for this hormone in the …

Winner of the William James Book Award “Magisterial... Makes an impressive argument that
most distinctly human traits are established early in childhood and that the general …

Michael Tomasello offers the most detailed account to date of the evolution of human moral
psychology. Based on experimental data comparing great apes and human children, he …

Recent evidence suggests that enduring social bonds have fitness benefits. However, very
little is known about the neural circuitry and neurochemistry underlying the formation and …

Stress is a major cause of poor health and mortality in humans and other social mammals.
Close social bonds buffer stress, however much of the underlying physiological mechanism …

Humans and great apes are highly social species, and encounter conspecifics throughout
their daily lives. During social interactions, they exchange information about their emotional …

Why share when access to benefits is uncertain is crucial to our understanding of the
evolution of humans' extensive cooperation. Here, we investigated some of the different …

Intergroup conflict is evident throughout the history of our species, ubiquitous across human
societies, and considered crucial for the evolution of humans' large-scale cooperative …

The neuropeptide, oxytocin, receives increasing attention due to its role in stress regulation
and promoting affiliative social behavior. Research across mammals points to a complex …