The following reference ensures statistics of other countries worldwide, rather than just the United States.
There is some debate among experts as to what the important component of the family structure is, particularly in the US, centering on whether or not a complete family or the love and affection of the children's parents is more important.
There are even some that argue that a single parent family is not even really a family.
In American society, where living standard is very high, single moms and single dads are more likely to be poor, not only because they don't have help in the household, but also because they didn't have much money to begin with.
An early performance of the song dates back to the 1870s by the Fisk Jubilee Singers.
Like many traditional songs, it has many variations and has been recorded widely.
It dates back to the era of slavery in the United States.
At the 2013 census, 17.8% of New Zealand families were single-parent, of which five-sixths were headed by a female.
Single-parent families in New Zealand have fewer children than two-parent families; 56% of single-parent families have only one child and 29% have two children, compared to 38% and 40% respectively for two-parent families.
Single parenthood has been common historically due to parental mortality rate (due to disease, wars and maternal mortality).
Historical estimates indicate that in French, English, or Spanish villages in the 17th and 18th centuries at least one-third of children lost one of their parents during childhood; in 19th-century Milan, about half of all children lost at least one parent by age 20; in 19th-century China, almost one-third of boys had lost one parent or both by the age of 15.