3 questions to test your understanding
The second demographic transition differs from the first demographic transition primarily in its...
The first demographic transition explains the decline in fertility from high to replacement level as a consequence of socioeconomic modernization — urbanization, declining child mortality, rising costs of children, female education. The SDT explains why fertility continued to decline below replacement and why family forms diversified. Its distinctive theoretical contribution is the emphasis on ideational change: the spread of post-materialist values (Inglehart), secularization, rising individual autonomy, and gender egalitarianism. These value shifts weaken the normative imperative to marry and have children, making alternative life-course pathways (cohabitation, voluntary childlessness, serial partnerships) both culturally acceptable and individually preferred.
The second demographic transition predicts that all societies experiencing sub-replacement fertility will converge on the same family formation patterns.
Answer: False
While the SDT identifies common tendencies (delayed marriage, rising cohabitation, sub-replacement fertility), the specific pathways vary substantially across societies depending on institutional context, welfare state regimes, gender systems, and cultural traditions. Northern Europe (especially Scandinavia) shows high cohabitation and out-of-wedlock births with relatively higher fertility, supported by generous parental leave and childcare. Southern Europe and East Asia show very low fertility combined with low cohabitation and out-of-wedlock births, because traditional family norms persist even as marriage and childbearing are postponed — producing a 'low fertility trap' where the incompatibility between traditional family expectations and women's new economic roles suppresses both marriage and fertility. The SDT framework identifies the direction of change but acknowledges path-dependent diversity in outcomes.
What is the role of 'post-materialism' in the second demographic transition theory, and how does it link values to demographic behavior?
Lesthaeghe argued that the first demographic transition was motivated by economic calculus (children became more costly and less economically useful), while the SDT is motivated by ideational change (people no longer feel obligated to follow a prescribed life course). The empirical evidence supports this: across European countries, measures of post-materialist values correlate with SDT indicators (later marriage, lower fertility, more cohabitation) even after controlling for GDP, education, and urbanization. However, critics argue that economic factors remain important — particularly housing costs, labor market precarity, and the cost of childcare — and that the emphasis on values underestimates the material constraints that shape family decisions.