Insect life strategies comprise all levels of sociality from solitary to eusocial, in which
individuals form persistent groups and divide labor. With increasing social complexity, the …

More than a century ago, William Morton Wheeler proposed that social insect colonies can
be regarded as superorganisms when they have morphologically differentiated reproductive …

Epigenetics is the study of changes in gene activity that can be transmitted through cell
divisions but cannot be explained by changes in the DNA sequence. Epigenetic …

During evolution, there have been several major changes in the way that genetic information
is organized and transmitted from one generation to the next. These transitions include the …

The hypothesis of group selection fell victim to a seemingly devastating critique in 1960s
evolutionary biology. In Unto Others (1998), we argue to the contrary, that group selection is …

Living things are organized in a hierarchy of levels. Genes group together in cells, cells
group together in organisms, and organisms group together in societies. Even different …

This book describes and illustrates the results of more than fifteen years of elegant
experimental studies conducted by the author to investigate how a colony of bees is …

In this novel introduction to modern microeconomic theory, Samuel Bowles returns to the
classical economists' interest in the wealth and poverty of nations and people, the workings …

Although positive reciprocity (reciprocal altruism) has been a focus of interest in evolutionary
biology, negative reciprocity (retaliatory infliction of fitness reduction) has been largely …

In both biology and the human sciences, social groups are sometimes treated as adaptive
units whose organization cannot be reduced to individual interactions. This group-level view …