Here's a fun word I just learned:
Theurgy. The art or technique of compelling or persuading a god, or beneficent or supernatural power, to do -- or refrain from doing -- something. (A person who practices theurgy is called a theurge or theurgist).
Theurgy has existed in just about every religion (at least in the western world) for millennia, whether it be praying to a rain god for the harvest or praying to Jesus, Allah etc. I am not so sure about eastern religions like Buddhism and Shinto, though.
Having read all that, I am not sure what the difference is between theurgy and necromancy. But I'm no theologian, so I can't answer that.
By the way,
Necromancy literally means "speaking to the dead", usually to gain some knowledge of the future. But when this is done, a necromancer would always speak to the spirit (or ghost) of the departed.
In its original meaning, necromancy never meant or involved "raising the dead", e.g. as zombies. It's uncertain when that meaning changed, but perhaps the
vodun religion of West Africa had to do with it, since part of it is the belief that a dead person can be revived after burial. (It's fairly well-known that after the Haitian Revolution of the 1790s, Afro-Haitians brought their beliefs with them to Louisiana).
The ancient Greeks, however, separated necromancy into two branches:
nekiya (or
nekya), the classical "raising up a spirit" to converse with it about what the future held; and
katabasis, or a physical "descent into the underworld" for conversing with a spirit. Obviously, this was very dangerous, and only attempted by mythological heroes (Odysseus, Herakles, etc.)... although many religions have stories of people who travelled through an underworld of some kind.
One last point: talking to the dead is by no means a preoccupation of ancient peoples. In the century between the 1850s and 1950s, roughly, a similar craze swept through at least the UK that culminated in ouija boards and seances. (Some people still believe in seances and pay good money to have one).
Anyway, sorry to digress! New words are fun.
