For almost a year, Shaughnessy lived with a group of homeless squatters on a vacant lot in Canada.  Their shanty town was called Tent City, and every day was an act of survival.  He chronicles this endeavor in a book called Down To This.  We discussed all sorts of things, including the use of violence as a method of communication, the spectrum of unique personalities he encountered, what the most important survival skill is, and how this skill would be useful in the zombie apocalypse.