Fear. People die from it sometimes and have ruined lives even when they don't die.

But most troubling of all, according to the UN report in 2005, is that "the largest public health problem created by the accident" is the "damaging psychological impact [due] to a lack of accurate information…[manifesting] as negative self-assessments of health, belief in a shortened life expectancy, lack of initiative, and dependency on assistance from the state."

In other words, the greatest damage to the people of Chernobyl was caused by bad information. These people weren’t blighted by radiation so much as by terrifying but false information. We ought to ponder, for a minute, exactly what that implies. We demand strict controls on radiation because it is such a health hazard. But Chernobyl suggests that false information can be a health hazard as damaging as radiation. I am not saying radiation is not a threat. I am not saying Chernobyl was not a genuinely serious event.

But thousands of Ukrainians who didn’t die were made invalids out of fear. They were told to be afraid. They were told they were going to die when they weren’t. They were told their children would be deformed when they weren’t. They were told they couldn’t have children when they could. They were authoritatively promised a future of cancer, deformities, pain and decay. It’s no wonder they responded as they did.

In fact, we need to recognize that this kind of human response is well-documented. Authoritatively telling people they are going to die can in itself be fatal.