Prolonged physiological stress responses form an important risk factor for disease.
According to neurobiological and evolution-theoretical insights the stress response is a …

BACKGROUND The social environment shapes human health, producing strong
relationships between social factors, disease risk, and survival. The strength of these links …

Discerning the relationship between sociality and longevity would permit a deeper
understanding of how animal life history evolved. Here, we perform a phylogenetic …

Within-group variation in sociality has been linked to correlates of fitness across vertebrates.
Individuals that form strong social bonds with a few partners, or are well integrated into a …

Many species use social interactions to cope with challenges in their environment and a
growing number of studies show that individuals which are well-connected to their group …

Understanding determinants of differential reproductive success is at the core of
evolutionary biology because of its connection to fitness. Early work has linked variation in …

People who are more socially integrated or have higher socio-economic status live longer.
Recent studies in non-human primates show striking convergences with this human pattern …

In most species the reproductive system ages at the same rate as somatic tissue and
individuals continue reproducing until death. However, females of three species–humans …

Comparative analyses are the backbone of evolutionary analysis. However, their record in
producing a consensus has not always been good. This is especially true of attempts to …

In most male mammals, fitness is strongly shaped by competitive access to mates, a non-
shareable resource. How, then, did selection favor the evolution of cooperative social …