Applying symmetry in each process is the only stable solution for Harmony in and among Humans. Since we, Humans, are a Consciousness System, each process that takes place in each Human has various impact in the physical and metaphysical energy realms. If you analyze in details, you can understand that Psychological Harmony is the cure for any problem that taking place in the world, call it population, conflicts, aggression, depression, elements change, climate change, and such.
Practicing Active Calmness or Active Positiveness can help building the equilibriumic mandala spheres in a Human Consciousness, to enable the Symmetric Perception.