Abstract

Evolutionary biology tries to explain the adaptability of different traits including social behaviour. However, it does not and cannot say anything about what is ‘good’ or ‘bad’ behaviour. If scientists try to do so they risk being put into the same category as ideologists and political demagogues. Evolutionary biology can tell us something about the phylogeny of certain types of behaviour including xenophobia. It can describe which constraints can lead to the outbreak of such behaviour, without thereby legitimating this behaviour.