Letters 83.22

Think of the calamities caused by drunkenness in a nation! This evil has betrayed to their enemies the most spirited and warlike races; this evil has made breaches in walls defended by the stubborn warfare of many years; this evil has forced under alien sway peoples who were utterly unyielding and defiant of the yoke; this evil has conquered by the wine-cup those who in the field were invincible.

Seneca, Letters to Lucilius 83.22, translated by Richard Mott Gummere