strike wave
A concept so old it comes to us in a dead language: divide et impera. The original phrase is attributed to Philip II of Macedon as he played Greek city-states off against one another in the fourth century BC. In ancient Greek, διαίρει καὶ βασίλευε; in English, divide and rule. A favoured tactic of emperors and dictators from Caesar to Bonaparte to Mao, it is also a staple of the modern workplace.