How about spare the rod, spoil the child.
Violence begets violence. Spanking (and of course more violent forms of punishment) is outdated, ineffective, and destructive to the parent/child bond. Violence, at any level, against children, should be obsolete by now. We are no longer living in the Dark Ages.
I know many say "well, I was spanked and I turned out fine." Yup. Lots of people did. But I'll bet they'd have turned out happier and better adjusted if they'd been treated with love, respect, and gentle parenting.
I think that circumcision without a medical reason is also wrong. What kind of a brain-dead idiot started this? Did someone wake up one day and say to themselves, "hey, let's welcome all our baby boys into the world by cutting off part of their genitals?" Its barbaric.