Libertarians argue that no normal adult has the right to impose choices on other normal adults, except in abnormal circumstances, such as when one person finds another unconscious and administers medical assistance or calls an ambulance.

Abstraction is a mental process we use when trying to discern what is essential or relevant to a problem; it does not require a belief in abstract entities.

If an individual is born with the obligation to obey, who is born with the right to command?

Group personification obscures, rather than illuminates, important political questions.

But there is no obvious reason for holding that some normal adults are entitled to make choices for other normal adults, as paternalists of both left and right believe.

Obligations may be universal or particular.

[L]et me point out that libertarians defend a tradition of liberty that is the fruit of thousands of years of human history.