by ad infinitum
I like the suggestions in this thread. Throwing out some more data here.We're 3-2 after early April, with the following levels of panic:
8 unstable (level 1)
7 rioting (level 2)
nothing beyond that
Every panicked city is adjacent to at least one more panicked city. The worst of it is a mess of six contiguous panicked cities. That ought to be fun later.