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

The reason the government sells the census as your ticket to getting goodies - rather than as your civic duty - is that distributing goodies is now all the government does.

Libertarians recognize the inevitable pluralism of the modern world and for that reason assert that individual liberty is at least part of the common good.

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

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.

Obligations may be universal or particular.

To repeat, communitarians maintain that we are constituted as persons by our particular obligations, and therefore those obligations cannot be a matter of choice.