On October 13, a woman was attacked in a Philadelphia subway in broad daylight, in front of several other passengers. [It was widely reported] that the assault lasted several minutes before anyone intervened - although some commuters turned their phones to record the incident. People saw and did nothing. This is not the first time something like this has happened and it won't be the last. But it garnered national news because people fretted that this type of incident may be the way we are now, after months of self isolation and self protection and the breakdown of social mores. Have we forgotten how to be together in a public place? Who we are in a crowd? T here is a well-documented psychological phenomenon called the bystander effect . Its basic assertion is that people are more reluctant to intervene in an emergency when others are present. In fact, the more people there are, the less likely any individual is to help any other person in trouble. There are so many barriers...