“The unprecedented success of technology in the last 50 years may have also created an expectation that failure should be anticipated and eliminated in all aspects of life. This leaves less and less tolerance for its inevitable persistence; very little margin is left for error. That is understandable in deciding whether bolts or welds should be used in a skyscraper (as became an issue in the Citigroup Tower in New York); large forces hinge on such small decisions. But that absolutist approach also entails unexpected sacrifices in other aspects of life, particularly when avoidance of failure and accident becomes the guiding principle for future design and behavior.”