(1) Is there really any true significance to the family birth order?
(2) Explain how sociological factors can contribute to inequality among siblings.
(3) How and why has family size, type and other aspects of family life changed from 1900 to 2000 (or so)?
(4) Why are extended families (e.g., those living with grandparents and other relatives) more prevalent in some societies and cultures and not so much in others?