Perhaps the first sign that this book would be a let down were the typos throughout the pages (such as "hunbands" for husbands p 211, "sores" for scores p 104). The carelessness of the authors was reflected in the poor quality of the content and its presentation. This book lacked a coherent voice, and others have noted the contradictory statements found throughout its pages.
Childcare varies dramatically across cultures. These discrepancies are attributed to the homestead and household environments. That is, the type of work performed by adult caretakers in a given community strongly influence the type of childcare used. In agricultural/ horticultural societies where work is done to provide sustenance for the community, siblings and similar-aged children are responsible for younger children. While many global communities prefer children aged 7–10 for designated caregiving responsibilities, children no younger than 12 are preferred in the Western world where paid childcare is common. http://www.youtube.com/e/eeCahRCgOfI?app=desktop
The benefits are completely mutual, as well as social: Men live longer, have better overall health and happiness, and earn more and achieve higher career success when they are married. Women are far less likely to be in poverty, are happier, and enjoy better sex, for example. Both are relieved from the economic pressures and loneliness that typically accompany the single life.