Seven years ago, a former aide to Ralph Reed — who also worked, briefly, for Paul Manafort — published a tawdry, shallow memoir that is also one of the more revealing political books I’ve ever read. Lisa Baron was a pro-choice, pro-gay rights, hard-partying Jew who nonetheless made a career advancing the fortunes of the Christian right. She opened her book with an anecdote about performing oral sex on a future member of the George W. Bush administration during the 2000 primary, which, she wrote, “perfectly summed up my groupie-like relationship to politics at that time — I wanted it, I worshiped it, and I went for it.”

It’s not exactly a secret that politics is full of amoral careerists lusting — literally or figuratively — for access to power. Still, if you’re interested in politics because of values and ideas, it can be easier to understand people who have foul ideologies than those who don’t have ideologies at all. Steve Bannon, a quasi-fascist with delusions of grandeur, makes more sense to me than Anthony Scaramucci, a political cipher who likes to be on TV. I don’t think I’m alone. Consider all the energy spent trying to figure out Ivanka Trump’s true beliefs, when she’s shown that what she believes most is that she’s entitled to power and prestige.

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Baron’s book, “Life of the Party: A Political Press Tart Bares All,” is useful because it is a self-portrait of a cynical, fame-hungry narcissist, a common type but one underrepresented in the stories we tell about partisan combat. A person of limited self-awareness — she seemed to think readers would find her right-wing exploits plucky and cute — Baron became Reed’s communications director because she saw it as a steppingstone to her dream job, White House press secretary, a position she envisioned in mostly sartorial terms. (“Outfits would be planned around the news of the day,” she wrote.) Reading Baron’s story helped me realize emotionally something I knew intellectually. It’s tempting for those of us who interpret politics for a living to overstate the importance of competing philosophies. We shouldn't forget the enduring role of sheer vanity.