The cognition of conflict: Ontology, dynamics, and ideology

What's the relationship between the actors' mental representations (beliefs, goals, ..) and the conflicts between them? And which is the relation (if any) between individual/subjective conflicts (among my goals) and social conflicts? How to build a systematic ontology of conflicts taking into account the Objective and the Subjective ones, the Internal or Individuals and the External or Social? Do External Conflicts require Internalized/Mentalized Conflicts? Are there objective conflicts the agents are not aware of? How do they work? Which is the relation between "contradictions" and "conflicts", and the need for mental "coherence"? Prejudice against conflicts: Is human society "social cohesion", "solidarity", cooperation (Durkheim)? Or "Bellum omnium contra omnes"? Why they are necessary expression of just one and the same ground. Why conflicts (social and mental) are good and useful, not a negative thing; and why they are the real condition for democracy