a state of rest or balance due to the equal action of opposing forces, equal balance between any powers

Link to present incidents:
„The American mathematician John Nash, who has died aged 86 in a taxi cab crash in New Jersey (returning from Norway where he had received the Abel Prize, CS), made his public mark as the subject of the 2001 film A Beautiful Mind. In his discipline, he gave his name to the Nash equilibrium – a position in a situation of competition or conflict in which both sides have selected a strategy, but where neither side can then independently change their strategy without ending up in a less desirable position.“ Guardian obituary