What informed the Kenyan dream of one spouse, two children, a three-bedroom house, a four-wheel SUV, and the recent addition of a fluffy white dog?

I wondered how two children became the standard unit for a middle-class family.

Looking back, our parents in the city lived in single rooms or two-room houses in Nairobi's Eastlands.

Some of these families had two spouses; polygamy was still the norm, even though some people had only one wife.