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

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.

Guardians are necessary for children and abnormal adults, because they cannot make responsible choices for themselves.

It is precisely because neither individuals nor small groups can be fully self-sufficient that cooperation is necessary to human survival and flourishing.

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.

Obligations may be universal or particular.