This week our Michigan Radio colleague Kyle Norris will be starting a series on homelessness. So, when I came across this post on the stellar Sociological Images blog I thought it was worth a mention.
It explores a study that finds our brains, not just our emotions, react to the homeless with "disgust." This happens in part because we see them as very different from ourselves. Then, with the help of our brains we build up our tolerance for seeing suffering among these people. We rarely feel empathy for them.