Nash Equilibrium: Stability and Unilateral Deviation

Not surprisingly, when the Nash equilibrium is reached, no cluster intends to unilaterally deviate from it. This means that each cluster has chosen its best strategy, given the strategies chosen by the other clusters. If any cluster were to unilaterally change its strategy, it would end up with a worse outcome. This is the essence of the Nash equilibrium: a state of balance where no player can improve their outcome by changing their strategy alone.