**5. Conclusions**

In this chapter, I introduced a formal framework, Dynamic Belief-Desire-Obligation Logic (Dynamic BDO-Logic), and I demonstrated how to describe two-player games and team games within this framework. Team games provide concrete examples for study of agent's individual and collective actions under acceptance of a normative system.

Many social activities of agents can be interpreted as moves in a game. The social reality is created by agents who plan their actions based on social normative systems and perform them. The structure of the society is constituted by acceptance of roles. An agent in a social organization accepts her role in it and performs actions within role-specific normative spaces. These kinds of activities of agents support the persistence of a society.

A human is born in a society that is already structured by activities of its current members and forerunners. She can choose her future actions, but her choice is always restricted by existing social normative systems. It will be an illusion if one tries to construct a society solely from an agreement among totally free isolated agents.

### **Acknowledgements**

I would like to thank the editor, Dr. Branislav Sobota, for valuable suggestions on the earlier draft of this chapter.
