Throughout the earlier and ruder phases of human evolution
this primitive conception of ancestors or dead relatives as the
chief known object of worship survives undiluted; and ancestor-
worship remains to this day the principal religion of the Chinese
and of several other peoples. Gods, as such, are practically
unknown in China. Ancestor-worship, also, survives in many
other races as one of the main cults, even after other elements
of later religion have been superimposed upon it. In Greece
and Rome it remained to the last an important part of domestic
ritual. But in most cases a gradual differentiation is set up
in time between various classes of ghosts or dead persons, some
ghosts being considered of more importance and power than others;
and out of these last it is that gods as a rule are finally
developed. A god, in fact, is in the beginning, at least, an
exceptionally powerful and friendly ghost--a ghost able to help,
and from whose help great things may reasonably be expected.

Again, the rise of chieftainship and kingship has much to do
with the growth of a higher conception of godhead; a dead king
of any great power or authority is sure to be thought of in time
as a god of considerable importance. We shall trace out this
idea more fully hereafter in the religion of Egypt; for the
present it must suffice to say that the supposed power of the
gods in each pantheon has regularly increased in proportion to
the increased power of kings or emperors.

When we pass from the first plane of corpse preservation and
mummification to the second plane, where burial is habitual,
it might seem, at a hasty glance, as though continued worship
of the dead, and their elevation into gods, would no longer be