Michael Ventura, If things turn out as you and James Howard Kunstler predict, a number of people will have no chance of survival – e.g., those in need of continuous high tech medicine [“Letters @ 3am,” Nov. 11]. Iron lungs will be too expensive to run, factories for making insulin will be able to serve only their immediate vicinity, and many depressives will simply not be able to tolerate the weather within their crania without their meds, and so will commit suicide. You speak of those who will be severely challenged; there are also those who are just plain doomed. In this country, we are all on a very high floor of a vast World Trade Center of biological and technological art, which stands a good chance of collapsing. Those who can reach the stairwell, go! Those who can't, well ...