Demographic trough(Outliers by Malcolm Gladwell)

Study found that there was a group of real successes and
there was a group of real failures, and that the successes
were far more likely to have come from wealthier families.

The decade of the 1930s is what is called a "demographic trough." In
response to the economic hardship of the Depression,
families simply stopped having children, and as a result,
the generation born during that decade was markedly
smaller than both the generation that preceded it and the
generation that immediately followed it.

Culled from Outliers by Malcolm Gladwell

Abdulkareem,Taoheedah kehinde