Threshold (Plutarchan)

In Plutarch's biographical method, the threshold is the decisive moment—the battle, the exile, the loss of power, the offer of tyranny—when circumstance removes the supports of habit and convention and demands a response that reveals character. Thresholds are structurally similar across lives: they are unrehearsed (no amount of prior success guarantees readiness for this particular reversal), they are consequential (the response shapes the trajectory that follows), and they are diagnostic (they reveal what years of formation deposited in the person). Cato at Utica faced the threshold of the Republic's fall; his response (suicide rather than accommodation) revealed a character that valued principle above survival. Solon faced the threshold of Athenian near-civil-war; his response (compromise that satisfied no faction fully) revealed a character that valued the polis above personal consistency. The AI transition is a threshold event at civilizational scale: it arrived for everyone simultaneously, removed the familiar coordinates of knowledge work, and demanded responses that no one's prior career had fully prepared them for. The quality of each person's response is revealing the character that