Marketism/positive obligation

A positive obligation is an obligation to take some action.

Marketists believe that only negative obligations exist without prior voluntary agreement, while positive obligations only exist by voluntary agreement to a contract specifying them.

Reality

This ignores (or at least flies in the face of) the long history of positive obligation encoded in both tradition and law:

• The Obligation to Render Assistance at Sea (duhaime.org, a legal reference)
• Maritime Law: Cruise Ships and Assistance for Distressed Boaters
• Wikipedia: Duty to rescue, Law of obligations