BOO - // What's changed between then (70's) and now? //
What's changed is the absence of the extended family unit, where people learned parenting skills from their family, who re-enforced discipline as children grew up.
What we have now is two or three generations of parents who have literally no parenting skills, and that of course becomes a self-fulfilling prophesy - you can't parent your own children if you have no example from your parents to follow, so the whole thing spirals downwards.
I have banged on for years that nursery education should be funded and staffed properly by professionals who can educate children in self respect and caring for others, so that future generations can grow up with a sense of awareness that current generations simply do not have anymore.
That in a nutshell, is why we have malodorous bullied children - they come from malodorous bullied parents.