[Anniversary Essay}

Amotz Zahavi

Correspondence: A. Zahavi, Institute for Nature Conservation Research, Tel-Aviv University, Ramat-Aviv, Tel Aviv, 69978 Israel (email: zahavi@post.tau.ac.il). Animal Behaviour, 2003, 65:5:859-863

Abstract

This is the story of my involvement in sociobiological studies. I first discuss group selection models, which were common in the 1950s. I then move on to kin selection and reciprocity models, which were developed to replace group selection models and are still being used by many sociobiologists, even though I argue that they contain the same weaknesses that led group selection to be rejected. As an alternative, I present the handicap principle, an essential component in all signalling. The handicap principle is useful in understanding many components of social systems, not the least of which is why individuals invest in the benefit of other members of a social system (altruism).

[Copyright 2003 Published by Elsevier Science Ltd on behalf of The Association for the Study of Animal Behaviour.]