Career

The Defining Decade

by Meg Jay

Do your twenties really count?

Meg Jay is a clinical psychologist who has spent years listening to people in their twenties. Many treat the decade as a warm-up, a time to drift before real life starts at thirty. Jay thinks that's an expensive mistake, because so much of adult life gets set in these years.

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What you'll learn

  • Get identity capital
  • Friends of friends
  • Alaska or Fiji
  • A brain still being built
  • Sliding, not deciding

The key ideas in The Defining Decade

Get identity capital

Jay borrows the term from the sociologist James Côté. Identity capital is everything you can show about yourself, from qualifications and jobs to the problems you've solved and the way you talk about them. Each piece is something to trade for the next opportunity, so pick work that adds some.

Friends of friends

Twentysomethings tend to stick with a close group of friends, which Jay calls the urban tribe. The trouble is that close friends mostly know what you know. Drawing on Mark Granovetter's research, Jay says new jobs and ideas tend to arrive through weak ties, the people you only half know.

Alaska or Fiji

Jay compares twentysomethings to planes that have just taken off from Los Angeles, heading west. A tiny change of course soon after take-off decides whether you land in Alaska or Fiji. One class, one job or one relationship now can move you a long way later.

A brain still being built

The frontal lobe, the part of the brain that plans and weighs up consequences, is still maturing through the twenties. Jay sees this as good news. The brain has its last big growth spurt in these years, so what you practise now helps shape the adult you turn into.

Sliding, not deciding

Plenty of couples move in together because it's cheaper or easier, without ever choosing to. Jay borrows a phrase from relationship researchers for this, sliding rather than deciding. A shared lease, furniture and a dog then make it much harder to leave a relationship that isn't right.

Lines worth underlining

  1. No warm-up

    Your twenties are not a warm-up. Choices made now shape the rest of your adult life.

  2. Identity capital

    Collect identity capital, the jobs and skills that show who you are and open the next door.

  3. Weak ties

    New jobs and chances usually come from weak ties, the people you barely know.

  4. What you know

    Admit the thing you already know you want, even if saying it scares you.

  5. Sliding

    Moving in together is a big step, yet many couples slide into it rather than decide.

Hot take · true or myth?

The first ten years of your career have a huge effect on your lifetime pay.

See the book's answer

True. Jay points out that most of the growth in people's earnings happens early in their careers. Starting late, or drifting for years, is hard to make up for afterwards.

One thing to try

Message one weak tie

List five people you know slightly, such as a former tutor, a friend's older sister or someone from an old job. Pick the one closest to work you'd like to do. Send them a short message today asking for twenty minutes and one piece of advice.

There's more to The Defining Decade

Knotd has the key ideas from 250+ non-fiction books, each in a few minutes, in plain words. The Defining Decade comes with a Hot Take round and a Your Move story to make it stick.

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Questions about The Defining Decade

What is The Defining Decade about?

Do your twenties really count? Meg Jay is a clinical psychologist who has spent years listening to people in their twenties. Many treat the decade as a warm-up, a time to drift before real life starts at thirty. Jay thinks that's an expensive mistake, because so much of adult life gets set in these years.

What are the key ideas in The Defining Decade?

Get identity capital; Friends of friends; Alaska or Fiji; A brain still being built; Sliding, not deciding.

What's one thing to try from The Defining Decade?

List five people you know slightly, such as a former tutor, a friend's older sister or someone from an old job. Pick the one closest to work you'd like to do. Send them a short message today asking for twenty minutes and one piece of advice.

Is The Defining Decade on Knotd?

Yes. Knotd has the key ideas from The Defining Decade in a few minutes, in plain words, plus a Hot Take round and a Your Move story to test them. It's one of 250+ non-fiction books in the app.