I attribute it a lot to working parents who have day care raise their children. My wife and I agreed beforehand that raising the kids was her job. I don't think we even left them with relatives before they were 2 or 3 and then only for an evening etc. As they reached school age and prior she did some work from home stuff. Best was working lures for Dick Nite, did that for like 25 years, and I did some also during that time.
We're watching my newest grandson on Mondays and Wednesdays while his mom has to work in the office, we're trying not to screw him up too much. I think he'll be ok.