Millennials especially have embraced this so-called FIRE movement — the acronym stands for financial independence, retire early — seeing it as a way out of soul-sucking, time-stealing work and an economy fueled by consumerism.

Followers of FIRE tend to be male and work in the tech industry, left-brained engineer-types who geek out on calculating compound interest over 40 years, or the return on investment (R.O.I.) on low-fee index funds versus real estate rentals.

Indeed, much of the conversation around FIRE, on Reddit message boards or blogs like Mr. Money Mustache, revolves around hacking one’s finances: strategies for increasing your savings rate to the hallowed 70 percent, tips for cheap travel through airline rewards cards, ways to save nickels and dimes at the grocery store.

Some practice “lean FIRE” (extreme frugality), others “fat FIRE” (maintaining a more typical standard of living while saving and investing), and still others “barista FIRE” (working part-time at Starbucks after retiring, for the company’s health insurance). To be “firing” is to slash one’s expenses to maximize saving while amassing income-generating investments sufficient to support oneself. To have “fired” is to have achieved that goal.

More at the NY Times (paywall)