[jungturk]

This general concept is described in the "evolutionarily stable strategies" aspect of game theory.

In certain environments (say, one dominated by good-faith communicators) it may be advantageous to be a bad-faith communicator, while in other environments it may not.

The resulting fluctuations in the mix of strategies deployed in the environment (as agents seek out better performing strategies) may well be unstable (i.e. a particular strategy's performance depends on what's presently dominant).