Which would you rather have?
So it looks like half of you would rather spend your entire lives as someone else's property than to spend 13 years in school.
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But in all seriousness, contrary to popular belief, Murray Rothbard did not advocate for child slavery. He openly said that a child has a right to run away from their parents/guardians if they are abusive or neglectful. The free-market of children is more like privatized adoption.
@xianc78 In For a New Liberty he also says that parents can drive their kids somewhere into the woods and then leave them there to die
uh cain shid 
edit: found him, his name was Helmet Kentler