Bleg for the crowd:
Sources, Statistics and/or time-series Charts, preferably for as many nations as possible, and preferably disaggregated by ethnicity, income, education, etc. showing:
Percentage of 18-year olds who were raised from birth by both both biological parents, who were married to each other the whole time.
My guess is that by 1964, the figure for American white baby-boomers was probably near 90%. It’s a lot lower now, I’m not sure how much lower. My impression is that for blacks in 2013, we’re talking about less than 10%, perhaps a lot less.
I think this figure is more enlightening that the ‘divorce rate’ for the unfortunate reason that many single mothers never got married and thus couldn’t ever divorce.
Any help or pointers are greatly appreciated.