At an oceanic-oceanic convergent boundary, one of the plates is pushed under the other one.
Return to normalcy would be the answer
In the year 507 B.C., the Athenian leader Cleisthenes introduced a system of political reforms that he called demokratia, or “rule by the people. ... Although this Atheniandemocracy would survive for only two centuries, Cleisthenes' invention was one ofancient Greece's most enduring contributions to the modern world.