A system that preserves freedom—not your freedom in every particular case, but the prevalence of freedom in general for people in general—must restrict your fre

A system that preserves freedom—not your freedom in every particular case, but the prevalence of freedom in general for people in general—must restrict your freedom to give yours away. You're not allowed to sell yourself to slavers, even if you want to. Slavers can't exist at all. It's understood that if they did, the slavers would exploit your "freedom" to create a world where, in reality, the circumstances leave you no alternative except to "freely choose" to be a slave.