Argument: Corporal punishment makes children more violent individuals
"Child Corporal Punishment: Spanking. The anti-spanking position". Religious tolerance: "It trains a child to use violence: Spanking can teach children that it is acceptable for the strong to use force against the weak -- the concept "Might makes right" is regularly reinforced. They have an increased likelihood of becoming more aggressive towards their siblings, their fellow students, and (later in life) against their spouses and their own children. Violence as a way of behaving is a learned response."
Philip Greven, Spare the Child: The Religious Roots of Punishment and the Psychological Impact of Physical Abuse, Alfred A. Knopf, Inc., (1990): "Corporal punishments always figure prominently in the roots of adolescent and adult aggressiveness, especially in those manifestations that take antisocial form, such as delinquency and criminality. Assaults upon children by adults in the name of discipline are the primary familial models for aggression, assaults, and other forms of antisocial behavior, delinquency, and crime that emerge when children grow up."
Jan Hunt. "Ten Reasons Not to Hit Your Kids". The Natural Child Project: "1. Hitting children teaches them to become hitters themselves. Extensive research data is now available to support a direct correlation between corporal punishment in childhood and aggressive or violent behavior in the teenage and adult years. Virtually all of the most dangerous criminals were regularly threatened and punished in childhood. It is nature's plan that children learn attitudes and behaviors through observation and imitation of their parents' actions, for good or ill. Thus it is the responsibility of parents to set an example of empathy and wisdom."