Fault-tolerant technology

Seems to me that a lot of potential problems in the world are there because of technology and systems that only work when everything is going well, and that aren't prepared for things going wrong, or for deliberate misuse. Un-collapsible buildings and un-highjackable planes are certainly technologically possible. But it is generally not how we design things. Too many of our technological constructions have single points of failure. Knock out a few key pieces, and the whole thing tumbles down. Blow up a few supporting pillars and a building falls down. Cut the right cable and millions of people have no TV or electricity. Pull out the plug out of your own computer and, no matter how many millions of transistors it has, they all stop working. more >