NICSO 2011 has offered an inspiring environment for debating the state of the art ideas and techniques in nature inspired cooperative strategies and a comprehensive image on recent applications of these ideas and techniques.The topics covered by this volume include swarm intelligence (such as ant and bee colony optimization), genetic algorithms, multiagent systems, coevolution and cooperation strategies, adversarial models, synergic building blocks, complex networks, social impact models, evolutionary design, self organized criticality, evolving systems, cellular automata, hybrid algorithms, and membrane computing (P-systems).