Spent

If our purchases are signals, the next question is what, specifically, they're signaling. Here Miller leans on one of the more durable findings in personality psychology: that human variation sorts fairly cleanly along a handful of dimensions. There's general intelligence, and then the five broad traits researchers call openness, conscientiousness, extraversion, agreeableness, and stability. Six numbers, roughly, that capture much of what makes one person different from another — and, Miller argues, much of what we're desperate to advertise to potential mates and allies.

The trick marketers have stumbled onto, in his account, is selling products as proxies for these traits. A stack of unread literary novels signals openness. A relentlessly tidy, gadget-optimized kitchen signals conscientiousness. Loud clothes and a convertible signal extraversion; charity galas and fair-trade coffee signal agreeableness. We buy the object hoping to transmit the trait — hoping the audience will infer the invisible quality from the visible purchase. The bag stands in for the intelligence, the running shoes for the discipline.

Once the display machinery is exposed, Spent turns to the emotional residue it leaves behind. If a purchase is a bid for others' regard, and if the regard it wins is thinner than promised, then the familiar deflation after a big buy isn't a personal failing. It's structural. The object delivered a jolt of anticipated status and then quietly failed to convert into the recognition we were actually hungry for. We wanted to be seen a certain way; we got a possession instead.

Miller reads the treadmill of consumer dissatisfaction through this gap. Advertising, he argues, works by promising the trait rather than the object — not a fragrance but the confidence and desirability the fragrance implies. What arrives is the fragrance. The trait was never in the bottle, because traits live in behavior and character, not in packaging. So we return to the market for the next fix, chasing a self-image that no product can deliver because no product was ever the right vehicle for it.

Step back from the individual shopper and Spent starts to look like a critique of an entire economic logic. If a huge slice of consumer spending is fitness display in disguise, then a large fraction of the modern economy is devoted to helping people signal traits they may not have, to audiences who increasingly distrust the signals. That's an enormous machine running at low honesty and high cost. Miller's evolutionary lens turns waste from a moral complaint into a design flaw — a mismatch between ancient display instincts and an environment built to exploit them.

The provocative part is his suggestion that we could signal the same things far more cheaply. If what we're broadcasting is intelligence, openness, warmth, and conscientiousness, there are honest channels for all of them that require no purchases at all — conversation, creativity, generosity, sustained attention to the people around us. Miller floats deliberately radical ideas, including taxing conspicuous consumption rather than income and letting people display their qualities directly, on the reasoning that the display arms race, like the peacock's tail, imposes real costs while producing no net gain in who ends up admired.

Return to the showroom, and the flicker behind the buyer's eyes reads differently now. It was never really about the car. It was a social animal trying to say something true about itself — that it's healthy, capable, worth choosing — using the only vocabulary the surrounding culture handed it. Miller's achievement in Spent is to make that vocabulary visible without sneering at the speaker. The desire underneath is old, honest, and shared by everyone who has ever wanted to be admired.