Civilisation Defined
From A Study of Our Decline by P Atkinson (15/11/2014)

A Civilisation is a dominant community that imposes its beliefs upon all other communities by violence (war) or its threat, which must involve the threat, or use of, genocide so any community that recoils from inflicting genocide will suffer genocide.

A Community is a shared understanding; a creature that has a life-cycle like any other as it first waxes to a prime before waning into senility then dissolution.

As a civilisation is a community, and a community is an understanding, then the study of civilisation must be the study of understanding and so it is philosophy.

The Premises The Theory in Detail