The House Republican caucus is close to ungovernable these days. How did this situation come about?

This was not just the work of the Freedom Caucus or Ted Cruz or one month’s activity. The Republican Party’s capacity for effective self-governance degraded slowly, over the course of a long chain of rhetorical excesses, mental corruptions and philosophical betrayals. Basically, the party abandoned traditional conservatism for right-wing radicalism. Republicans came to see themselves as insurgents and revolutionaries, and every revolution tends toward anarchy and ends up devouring its own.

By traditional definitions, conservatism stands for intellectual humility, a belief in steady, incremental change, a preference for reform rather than revolution, a respect for hierarchy, precedence, balance and order, and a tone of voice that is prudent, measured and responsible. Conservatives of this disposition can be dull, but they know how to nurture and run institutions. They also see the nation as one organic whole. Citizens may fall into different classes and political factions, but they are still joined by chains of affection that command ultimate loyalty and love.

All of this has been overturned in dangerous parts of the Republican Party. Over the past 30 years, or at least since Rush Limbaugh came on the scene, the Republican rhetorical tone has grown ever more bombastic, hyperbolic and imbalanced. Public figures are prisoners of their own prose styles, and Republicans from Newt Gingrich through Ben Carson have become addicted to a crisis mentality. Civilization was always on the brink of collapse. Every setback, like the passage of Obamacare, became the ruination of the republic. Comparisons to Nazi Germany became a staple.

This produced a radical mind-set. Conservatives started talking about the Reagan “revolution,” the Gingrich “revolution.” Among people too ill educated to understand the different spheres, political practitioners adopted the mental habits of the entrepreneur. Everything had to be transformational and disruptive. Hierarchy and authority were equated with injustice. Self-expression became more valued than self-restraint and coalition building. A contempt for politics infested the Republican mind.