Over time, an equilibrium of joining and breaking is reached, but where that equilibrium lies depends on the strength of any central organisation.

ECONOMIST: Modelling conflict

Our sensitive social framework, in the time of plenty, was largely kept in equilibrium - until now.

CNN: What the reform movement really means

Even if emission rises were halted now, the planet would continue to warm because of the time it takes for the climate system to return to equilibrium, he said.

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