A huge amount of research on fear and the brain teaches us that we exaggerate threats that are rare, spectacular, immediate, random — in this case involving an innocent child — senseless, horrific and graphic. Terrorism pushes all of our fear buttons, really hard, and we overreact.

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Terrorism isn’t primarily a crime against people or property. It’s a crime against our minds, using the deaths of innocents and destruction of property as accomplices.

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So what should we be afraid of?

BS: Car crashes. Global warming. It feels insensitive to say it so close to the tragedy, but it’s true. What people should worry about are things so common that they’re no longer news. That’s what kills people. Terrorism is so rare, it’s hardly a risk worth spending a lot of time worrying about.