Collective Delusion
Washington State’s HistoryLink site has a great article on collective delusion (a.k.a. “mass hysteria”).
In this case, the year is 1954. A few vandals cause pitting in some windshields, and this makes the news. People soon start noticing similar pitting in their own windshields. The number of these “incidents” grows until they clearly can’t be explained by vandalism, and everything from nuclear radiation to supernatural activity gets blamed (and investigated, at high taxpayer expense). So what was it?
Apparently, there were a few cases of vandalism. As for the rest of the “incidents”, they were pitting that was always there, and occurs as a normal part of driving. No one noticed it until they started looking, is all.
It’s funny to look back on this now, but the same thing regularly happens today. Remember the US just after the WTC attacks in 2001? Everyday occurrences were being reported as “terrorist threats”, and the tiniest of security problems was suddenly a “gaping hole” that terrorists would strike at if we relaxed our vigilance the tiniest bit. My favorite example is the people in the State of Minnesota preparing for a terrorist attack on the Mall of America.
While the State repeatedly told people that there were no likely targets in Minnesota, people refused to go to the Mall of America for fear of being there during an attack. Several normally intelligent people I know who live near said mall made emergency plans in case of an attack. None of these people took the time to think about the fact that it’s a mall, with little or no international (or even national) significance.
But, when people want to believe something is true, they will find supporting evidence everywhere. A lot of the hysteria has died down, but we still see people reacting this way. Collective delusion occurs when people latch on to a threat and start to find evidence of it everywhere they look. A prime example is Medical Student Syndrome, where students studying a disease suddenly discover that they have symptoms, when in fact their observations are of perfectly normal conditions. Of course, the public is no better when it comes to that sort of thing.