One way in which a new organismic character can originate is via allelic replacement: a
mutant genetic allele increases in frequency under selection favouring the affected …

The key evolutionary problem concerning the origin of eusociality, and of helping systems in
general, is how genes could be selected when their effect is to decrease the reproduction of …

This chapter deals with what the social insects can teach us about social evol-ution and kin
selection, since it is in these areas that social insect research has made some of its most …

Kin-selection theory (Hamilton's" genetical theory") explains how aid that is self-sacrificing
(in terms of classical individual fitness), or" altruism," can evolve if sufficiently beneficial to …

Delineation of the selective pressures responsible for the evolution ol sterile worker castes
found in social insect colonies remains a major unsolved problem in evolutionary biology …

This paper introduces a Theme Issue presenting the latest developments in research on the
interplay between flexibility and constraint in social behaviour, using comparative datasets …

This paper considers the ways in which substantial discontinuous variation in behaviour
(called alternative tactics) arise during the course of the lives of individuals. First, it considers …

For several years the study of social behavior has been undergoing a revolution with far-
reaching consequences for the social and biological sciences. Partly responsib are three …

Kin selection has been used to explain evolution of man altruistic traits found in those social
insect castes which have reduced reproductivity. Kin selection is most probable among …

Abstract true sociality is surprisingly common in the animal kingdom, and thus attracts
attention for its diversity and patterning/descriptions of sociality need to rely on a useful …