# Family, Generations and the Life Course

Sociology I · Contemporary Social Processes · https://tryals.app/learn/sociology-i/family-generations-and-the-life-course

## De-institutionalisation, Not Disappearance

**Ron Lesthaeghe and Dirk van de Kaa** named the **second demographic transition** in 1986. The first transition saw mortality and fertility fall. The second involves what happens next:

* Sustained below-replacement fertility
* Later and less universal marriage
* Widespread cohabitation and rising non-marital births
* Higher divorce rates
* A cultural shift towards self-realisation

**Andrew Cherlin** analysed the family itself through the **de-institutionalisation** of marriage. Social norms defining spousal behaviour have weakened. Marriage is now negotiated between partners rather than following a set script. It did not disappear, but it lost its role as the default framework for adult life.

Household structures changed alongside these norms. Roughly **28 per cent** of Spanish households now contain just one person. One-person households are the fastest-growing type across the European Union. They reflect later partnership in youth and rising survival into widowhood at older ages.

## The Life Course and Cohorts

The **life course** approach, pioneered by **Glen Elder**, examines life transitions within historical time. The traditional path to adulthood has become **de-standardised**. Transitions are now reordered, repeated, and stretched out.

In the European Union, Spanish youth leave home at a mean age of **30**, compared to an EU average of **26** (Eurostat). Jeffrey Arnett calls this extended stage **emerging adulthood**.

**Generations** require careful sociological handling. **Karl Mannheim** argued that a cohort only becomes a generation when shared historical events activate it. **Norman Ryder** showed how cohort replacement drives broader social change.

Disentangling these dynamics creates a methodological challenge:

| Effect | Question it answers |
|---|---|
| **Age** | What changes as people age, regardless of period? |
| **Period** | What affects everyone at a specific point in time? |
| **Cohort** | What is unique to people born at a specific time? |

> **Common pitfall:** using pop labels like Generation Z. Real cohorts require shared historical exposure, not arbitrary birth-year cut-offs.

## Practice questions

9 of this lesson's 15 practice questions, with answers. The full set is in the app.

### 1. Survey data show that people born after 1990 report lower rates of home ownership than people born in the 1950s did at the same age. Why can that difference not be attributed to a generational character without further assumptions?

A. Postponed life-course milestones are mistaken for fixed generational shifts
B. Quantitative surveys cannot measure cohort consciousness without interviews
C. Linear dependence of age, period and cohort requires external assumptions
D. Cross-era cohort comparisons require identical survey years to control period

**Answer:** C. Linear dependence of age, period and cohort requires external assumptions

**Why:** Housing costs, credit conditions and labour contracts all changed over the same span, and those are period effects falling on everybody. Because cohort is an exact function of period and age, no model can apportion the difference between them on the data alone; the split requires an assumption, and the honest version of the claim states which one.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/survey-data-show-that-people-born-after-1990-report-lower-rates-of

### 2. Which changes belong to the second demographic transition as Lesthaeghe and van de Kaa described it?

A. Fertility settling durably below replacement rather than at it
B. Marriage occurring later and becoming less universal
C. A return of mortality to pre-transitional levels
D. A rise in cohabitation and in births outside marriage

**Answer:** A. Fertility settling durably below replacement rather than at it; B. Marriage occurring later and becoming less universal; D. A rise in cohabitation and in births outside marriage

**Why:** The second transition is defined against the endpoint the first was supposed to reach: not low and stable fertility around replacement, but sustained sub-replacement fertility alongside a reorganisation of partnership. Mortality plays no part in it, which is the cleanest way to keep the two transitions apart.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/which-changes-belong-to-the-second-demographic-transition-as

### 3. Complete the account of the three effects that any study of change over time must separate.

**Answer:** An **age** effect is what changes as people grow older, in any period. A **period** effect is what changes for everybody at once at a given moment. A **cohort** effect is what is distinctive about people born at a particular time. Because the third is exactly the second minus the first, they are linearly **dependent** and cannot be separated without an outside assumption.

**Why:** Stating the dependence precisely is what turns a vague warning into a usable rule. Any published estimate that reports all three effects has imposed a constraint — equal effects for two adjacent cohorts, a zero linear trend, a functional form — and the credibility of the result rests entirely on whether that constraint is defensible for the case at hand.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/complete-the-account-of-the-three-effects-that-any-study-of-change

### 4. Arrange the steps of the classic post-war standardised transition to adulthood, in the order it was expected to occur.

**Answer:**

1. Complete full-time education
2. Enter stable employment
3. Leave the parental home
4. Form a co-residential partnership
5. Have a first child

**Why:** The sequence is worth learning because every element of it is now routinely reordered, repeated or reversed: people return home after leaving, partner before stable employment, have children before marrying, and re-enter education mid-career. De-standardisation does not mean the transitions vanished; it means their order and timing stopped being predictable from one another.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/arrange-the-steps-of-the-classic-post-war-standardised-transition-to

### 5. Estimate the mean age at which young people leave the parental home in Spain, on recent Eurostat figures.

**Answer:** 30 (within ±2)

**Why:** **Around 30.** Housing costs, insecure early careers and the absence of a rental market oriented to young households are the usual explanations, and they matter more than any preference for family closeness: surveys consistently find young Spaniards wanting to leave earlier than they do.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/estimate-the-mean-age-at-which-young-people-leave-the-parental-home

### 6. In which year did Lesthaeghe and van de Kaa name the second demographic transition?

**Answer:** 1986

**Why:** **1986.** The framework has been criticised for treating northern and western Europe as the leading edge of a sequence everyone else follows, and for reading value change as a cause when it may be a consequence. Its descriptive checklist has nevertheless held up well across a wide range of countries.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/in-which-year-did-lesthaeghe-and-van-de-kaa-name-the-second

### 7. Sort each finding by whether it supports the individualisation thesis or complicates it.

**Answer:**

- Supports individualisation: Partnership arrangements are increasingly negotiated rather than inherited, Births outside marriage have become ordinary across most of western Europe
- Complicates individualisation: Marriage has become a marker of achievement entered later by the more advantaged, Intergenerational transfers of money and care within families have grown

**Why:** The second column is the standard sociological objection: households are smaller and family obligations are heavier, particularly in southern Europe, where families absorb what services do not provide. Individualisation describes a real loosening of scripts and coexists with intensified material dependence between generations, and any account that notices only one of the two is describing half the evidence.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/sort-each-finding-by-whether-it-supports-the-individualisation-thesis

### 8. Cherlin describes the de-institutionalisation of marriage, and in the same period marriage acquired new symbolic prestige in several countries. How can a weakening institution become a more prized one?

A. It covers only statutory legal reforms, leaving informal social norms around marriage intact.
B. Cherlin's thesis applies only to North America, while prestige rose solely in southern Europe.
C. Universal rates rebounded across Europe, restoring wedlock as the key adult life transition.
D. Weakened behavioural scripts leave marriage as an optional achievement marker, not a default.

**Answer:** D. Weakened behavioural scripts leave marriage as an optional achievement marker, not a default.

**Why:** Losing its status as the taken-for-granted framework is exactly what allows marriage to become a signal. When it is what everyone does at twenty-three, it says nothing; when it is entered at thirty-five after stable employment and a mortgage, it displays those achievements. The prestige rises as the obligation falls, and the two movements are the same movement.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/cherlin-describes-the-de-institutionalisation-of-marriage-and-in-the

### 9. Sociologists distinguish between a demographic cohort and a sociological generation. What makes this distinction vital when analysing social change?

A. A generation forms automatically whenever demographic replacement alters society
B. A cohort only becomes relevant when birth-year cut-offs are strictly standardised
C. A generation requires shared historical events to activate its cohort identity
D. A cohort reflects biological aging whereas a generation captures period effects

**Answer:** C. A generation requires shared historical events to activate its cohort identity

**Why:** Following Mannheim, mere co-presence in birth years does not forge collective consciousness; historical disruption must crystallise a cohort into an active generation. Ryder showed demographic replacement supplies the raw material, but history supplies the catalyst.

Page: https://tryals.app/practice/sociology-i/family-generations-and-the-life-course/sociologists-distinguish-between-a-demographic-cohort-and-a