Collective phenomena in economy and society

Also known as mass action, collective behavior, and artificial chemistry

Physics Examples

Solitons
Perturbation theory in quantum mechanics
Ising Model
The quantization of magnetic flux in a superconductor
quantum Hall effect are both collective phenomena associated with thermodynamically large numbers of particles.

the formation of nations, languages and religions show similarities to condensation of vapor into liquid droplets

Society shows sometimes abrupt changes - revolutions - which are related to phase transitions: both are sudden and dramatic changes of behavior.

Animal Magnetism, like Herding