Self-assembly, self-organization and division of labour

The prospect of generic principles of biological organization being uncover ed through the increasingly broad use of the concepts of 'self-assembly' an d 'self-organization' in biology will only be fulfilled if students of diff erent levels of biological organization use the same terms with the same me anings. We consider the different ways the terms 'self-assembly' and 'self- organization' have been used, from studies of molecules to studies of anima l societies. By linking 'self-assembly' and 'self-organization' with divisi on of labour, we not only put forward a distinction between the underlying concepts but we are also able to relate them to the question: Why has a cer tain structure been favoured by natural selection? Using the particularly i nstructive case of social resilience in ant colonies, we demonstrate that t he principle of self-organizing self-assembly may apply to higher levels of biological organization than previously considered. We predict that at the level of interactions among organisms within the most advanced animal soci eties, specialization through learning has a crucial role to play in reasse mbly processes. This review may also help important commonalities and diffe rences to be recognized between ordering mechanisms up to the social level and those further up the biological hierarchy, at the level of ecological c ommunities.