Spencer, Herbert. The principles of sociology. Vol. 1-3. (London : Williams and Norgate, 1876-1896).
"On remembering how large a share the resulting ancestor-worship had in regulating life among the people who, in be Nile valley, first reached a high civilization - on remembering that the ancient Peruvians were subject to a rigid social system rooted in an ancestor worship so elaborate that the living might truly be called slaves of the dead - on remembering that in China too, there has been, and still continues, a kindred worship generating kindred restraints; we shall perceive, in the fear of the dead a social factor which is, at first, not less important, if indeed is not more important, than the fear of the living."
Philosophy : Europe : Great Britain