From The New Republic:

Rarely do the police chiefs or concealed carriers whom Carlson interviews stop to consider if the ubiquity of firearms in America is the source of that constant sense of danger. Instead, their worldview is guided by twin instincts: what Carlson calls “gun militarism” and “gun populism.” Gun militarism, espoused by essentially every chief she interviewed, is synonymous with the infamous “Warrior Cop” training that conditions police to think of the world as filled with enemies at every corner who must be overpowered at all costs, necessitating an arms race with criminals. Gun populism, meanwhile, aligns with the pro-gun dogma that lawful gun owners carrying in public make America safer either by providing quick responses to threats when police aren’t present or by deterring crime in the first place. One is a top-down approach to meeting an ever-present threat, the other bottom-up. Most of the chiefs Carlson interviewed argued that gun militarism and populism complement one another.