If we remove this cycle of decency, what is the natural rate of humans that will hurt others?
The premise is flawed, humans learn from their environment and there's really no way to put a human in a coffin until they're 20 and see what they do then.
Yeah, but you can also find that rate if you remove the trigger (abuse) from the environment (society) and see how the rate changes.
You don't have to lock someone in a coffin, or something ridiculous like that (and that would be counterproductive anyway). You create a society, or a least a sub-society, where there's no abuse, and see how much abuse is invented by the people raised in that environment.
That's presuming the only influence on a child's development are the adults who are raising them, which is not true.
Let’s put it another way, if a catholic priest touches a choirboy, it’s not a good idea to let the choirboy become a priest and victimize the next generation of choirboys.
Gross but perhaps a benefit to society
Extremely individual reactions, what makes one tougher breaks another completely and permanently, and everything in between.
I'd say everybody experienced some sort and level of abuse, typical school bullies (which were usually also bullied somehow, hence the behavior).
Wonderful idea. Let's not forget to segregate the poors, since they commit violent crimes at higher rates too. We can build a perfect utopia if only we just get rid of all the undesirables!