Gen. Augusto Pinochet has been arrested in London after Spain asked that he be extradited for the presumed murders of hundreds of Chilean and Spanish citizens. Perhaps as a sign of how much Chileans wish to forget their years of polarized politics and repression under Gen. Augusto Pinochet, the immediate popular response here to the sensational news of his arrest in London has been remarkable for its moderation. The arrest of Gen. Augusto Pinochet shows the growing significance of international human-rights law, suggesting that officials accused of atrocities have fewer places to hide these days, even if they are carrying diplomatic passports.