From unicellular to multicellular organisation in the social amoeba Dictyostelium discoideum -- Optimality of communication in self-organised social behaviour -- The interplay of intracolonial genotypic variance and self-organisation of dominance hierarchies in honeybees -- Traffic rules of fish schools: a review of agent-based approaches -- A process-oriented approach to the social behaviour of primates -- Order and noise in primate societies -- Self-organisation in language -- Dictatorship effect of majority rule in voting in hierarchical systems -- Natural selection and complex systems: a complex interaction -- Interlocking of self-organisation and evolution.