If a society of people (society A) engaged in torture and slavery of their children as part of the culture, would it be correct and moral for another more powerful society (society B) of people to steal children away from society A for the good of the children? Assume that society B has a government that will protect the children's individual rights to freedom and pleasure.

I'd say yes, then nuke society A.

is this hypothetical or are you planning to kidnap somebodies children?

if it is hypothetical i, personally, would agree.

if your planning a kidnap, call social services.

I beleive this is also Hypothetical.

If a society of people (society A) engaged in torture and slavery of their children as part of the culture, would it be correct and moral for another more powerful society (society B) of people to steal children away from society A for the good of the children? Assume that society B has a government that will protect the children's individual rights to freedom and pleasure.

Yes. In fact, countries should be doing what they can to help take in more refugees from abusive countries. Countries have an ethical imperative to do so.

absolutely! in fact I wouldn`t even consider it "Stealing" as that word implies a Crime.

If a society of people (society A) engaged in torture and slavery of their children as part of the culture, .

Some people think that slapping a kid on the rump is torture, and making them clean their room is slavery.