written before 1970? no.
ode to west wind? no.

OK so, to sum up.
We have an abstract something that is associated with, but is not the title of, a single work of fiction written since 1970. It is not associated with magic or religion. It does not necessarily have any actual existence, but if it did it would not be restricted to a single location, nor does it necessarily involve any participation by a person. It is neither a decision nor an event. It is neither positive or negative, nor is it a colour. In addition there are a number of specific things it isn't.
So, it seems to be some sort of concept or idea.

part of a larger work like an aria? It is part of the work of fiction, but not really like an aria.
magic flute? no.
specific work of fiction a book? among other things, yes.
published before 2000? yes.
[INJ] I think your summary is accurate. I go back and forth a bit still on whether it is an event: I suppose it could be an event, although I still feel that no is the best answer to the question.

science fiction? yes.
Douglas Adams? yes *applause*
television? no.

42? No. (but that would have been a good subject to have chosen, now you come to mention it)

SEP? No. This kind of guessing could go on for a long time. :-)

improbability drive? An extremely plausible answer, and therefore wrong. Although it wouldn't surprise me if operation of the ID were to lead to it.

Interesting - the 'no' to television, from which I am tempted to assume that it did not appear/occur in the television series.