Libertarians typically argue that particular obligations, at least under normal circumstances, must be created by consent; they cannot be unilaterally imposed by others.

The first census in 1790 asked just six questions: the name of the head of the household, the number of free white males older than 16, the number of free white males younger than 16, the number of free white females, the number of other free persons, and the number of slaves.

Obligations may be universal or particular.

It is obvious that different individuals require different things to live good, healthy, and virtuous lives.

What libertarians assert is simply that differences among normal adults do not imply different fundamental rights.

Obviously, all of us have been influenced by those around us.

Libertarians recognize the difference between adults and children, as well as differences between normal adults and adults who are insane or mentally hindered or retarded.