Stories turn up all the time: altercations on airliners, brawls in bars, or domestic disputes that end in gunfire. The catchphrase is usually the same: "Alcohol was involved." Alcohol often fuels less physically dangerous but more emotionally stressful confrontations at parties, business conclaves, or family dinner tables, manifested as cruel, hurtful words that can have devastating long-term effects on the recipients. The catchphrase? "That was the...