Ben Schott, brilliant though he may be, did not coin the phrase. Time's London bureau chief Catherine Mayer did, for a feature called "10 Ideas Changing the World Right Now." Of my fellow amortals, she says:
In their teens and 20s, they may seem preternaturally experienced. In later life, they often look young and dress younger. They have kids early or late — sometimes very late — or not at all. Their emotional lives are as chaotic as their financial planning. The defining characteristic of amortality is to live in the same way, at the same pitch, doing and consuming much the same things, from late teens right up until death...It all describes me very well, depending on your definition of bad behavior. But Mayer's tone is dour, and she mutters about acting "age appropriate." Which is funny coming from someone married, according to Wikipedia, to Andy Gill, guitarist, producer and founding member of Gang of Four, one of my top ten bands of all time, who are still recording and touring, as seen in the 2008 video below. My guess is that at home he's a tourist.
They prop up the tottering music industry, are lifelong consumers of gadgets and gizmos, keep gyms busy and colorists in demand. From their youth, when they behave as badly as adults, to their dotage, when they behave as badly as youngsters, amortals hate to be pigeonholed by age.