San Antonio — I never really understood how fascism could have come to Europe, but I think I understand better now. You start with some fundamental historical transformation, like the Great Depression or the shift to an information economy. A certain number of people are dispossessed. They lose identity, self-respect and hope.

They begin to base their sense of self-worth on their tribe, not their behavior. They become mired in their resentments, spiraling deeper into the addiction of their own victimology. They fall for politicians who lie about the source of their problems and about how they can surmount them. Facts lose their meaning. Entertainment replaces reality.

Once facts are unmoored, everything else is unmoored, too. People who value humility and kindness in private life abandon those traits when they select leaders in the common sphere. Hardened by a corrosive cynicism, they fall for morally deranged little showmen.

And then perhaps there’s a catalyzing event. Societies in this condition are culturally tense and socially isolated. That means there are a lot of lonely, alienated young men seeking self-worth through violence. Some wear police badges; some sit in their rooms fantasizing of mass murder. When they act, the results can be convulsive.