Philosophy is defined in many dictionaries as the love of wisdom or knowledge, but this merely reveals the confusion of the community. Tradition does not reveal what constitutes wisdom or that only the knowledge of a sane understanding can be the correct recognition of cause and effect! As tradition has been unable to define wisdom or sanity, the community has NEVER known what philosophy is. Ergo, before philosophy can be defined, then wisdom and sanity must be defined.
However for sanity to be the same for every man, the revered code must be common to every man; and the interpretation of the code must be applied independently of any particular manʼs wishes; which is the traditional role of religion.
Thus without the worship of an independent code dictating right from wrong—a religion—no man, and no community, can be sane or free from delusion.
Wisdom is the understanding allowed by combining sanity and knowledge, so philosophy can be defined as the study of understanding. This is confirmed by those sources of knowledge that describe philosophy as being about ultimate reality, for reality, ultimate or otherwise, can only be the perception of an understanding.
As a civilisation is an understanding then Philosophy can be considered the study of civilisation. And a theory of civilisation must be philosophy.