Being a "baby boomer" I'd say a large percentage of us were "unplanned babies". In fact during that era I think a lot of people just "expected" to graduate from high school, get a job, get married, and start a family. There wasn't a thought out "plan" only an "assumption". Also there weren't nearly as many quality birth control methods which offered them easy access.
There was not a whole of "planning" going on. At least not in terms of building a nest egg, buying a home, making sure one has resources like medical & life insurance in place (before) having children.
Those who did go to college oftentimes made their lives more stressful then it had to be by getting married, having, children, and working while going to school at night. If they had gotten their education, established a career path, and (intelligently chose) a mate with the (same values) to marry; most children would have had better and more stable childhoods in that era.
Stressful households are toxic for children.
Too bad we only get one set of "formative" years. :)