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Imitation and Spontaneous Symmetry Breaking

This model is an agent-based implementation of a very simple imitation behavior, based on the Ising model of ferromagnetism, with no external influence and no uncertainty.

It is the example used by Serge Galam in his paper titled "Spontaneous Symmetry Breaking and the Transition to Disorder in Physics". where people have to choose between green or red T-shirts.

The model starts with a random distribution of red and green individuals. In each step all agents evaluate their 8 nearest neighbors and adopt the color of the mayority. What can be observed is an almost immediate symmetry breaking, from the initial randomness to the evident clustering of behaviors.

The model was created with AnyLogic - simulation software / Social Dynamics