That linking may or may not be so relevant when there may be many more factors involved, or more water under the bridge since early childhood
diver dan,
Imagine being guilty of producing a child like Paul1405 ? Anyhow, future indiscipline is a direct link to no past discipline !
There's no in-between as there's no pause in the development of mentality. That water under the bridge is experience in common terms & that ranges from very bad to very good. A selfish person will never be a good parent no matter how many "resources" you provide them with.
A child that has never been disciplined will never be disciplined enough to consider others as anything more than someone to exploit or ridicule i.e. of poor mentality & poor character !

Children aren't small adults. They have yet to develop the cognition to allow them to make valid and thought-out decisions or to control their emotions. For this reason children are prone to tantrums and irrational reactions to minor provocations.

These days the 'preferred' approach to this is to try to reason the child out of their unreasonable actions. It often works or at least de-escalates. But there are times when no amount of 'reasoning' will snap irrational behaviour and then a shot sharp smack is how you bring the child back to reality. The notion that this teaches kids to be violent is rubbish and isn't backed by the slightest science or sociological research.

No one is suggesting that ongoing violence or gratuitous violence against kids is valid or in the slightest bit helpful. But the occasional short sharp smack is a valuable tool that most parents now abjure to their cost.

I had three kids who rarely, if ever, got hit. The story that I passed on to them when they became parents has helped them to raise well-behaved (grand)kids also. One night my 4 yr old eldest was out of control. I gave him an out by counting to 3 before administering the short sharp smack. I'd never hit him before and it shocked him into reality. Thereafter he knew the consequences of my getting to '3' in the count and the short sharp smack became superfluous. The funny part was that I never had to do this with his younger siblings when they got older. Even though they never experienced what happened at '3' they knew their elder brother avoided it, and they adopted the same stance.

The 'experts' in child raising have misled most parents and governments, chasing the warm inner-glow have made any sort of punishment problematic. They aren't doing society any favours.

Who sat me on the cold, cold, pot
Whether I wanted it or not?
Me Mudder

Who took me from my warm, warm, bed
And smacked my bum till it was red?
Me mudder

When at night the bed did squeak
And I raised my head to have a peek
Who yelled at me to go to sleep?
Me fadder!

Foxy,

Funny, cheers !
I can actually remember such an incident when I was about 4.

Old man arrested in Birkdale was trying to abduct 8 year old girl from her mother in shopping centre car park. Some people are strange.

Paul1405,
Strange indeed & even more strange are those who defend that old man !