Thanks for your thoughts as well. I do think that for any
human secret society with power,
it would be hard to meddle. But there are two things that are going on that make it a bit hard.
1: Perception of humans.
The Nalu are long-lived, and change their perception slowly. Only a generation ago,
humans were ephemeral, dirty, squabbling, ignorant apes. Manipulating human cultures was
not a particularly fruitful endeavor -- the persons you manipulating, even the entire culture,
would be gone long. Even spending effort to learn it seemed mostly fruitless, only a few Nalu
were interested: Niraet who got buried by an eruption for his troubles, and more recently the
"anthropologist" Eliraet. There is even a distaste for getting too involved with them: they are
too much like "real people", but have characteristics of animals. To have a more positive attitude,
there is also potential heartbreak -- you can get close enough to the Zve, but they will die on you
of the silliest infections and injuries, even with Nalu help. And even the luckiest of them die in 60-70 years.
Intellectually, they understand that humans' technology makes them much more dangerous now,
including the nukes and the sheer size of chemical and biological impact on Earth. But perceptions change slowly.
Consider the lag in perception even among human societies when a relatively undeveloped country/culture
advances in power and influence.
2. The Nalu have been sinking into a kind of cultural depression for a very long time.
Long before the end of the last glacial period 11,000, they settled into a slow population decline.
Take what happens to the first-world countries, and extend it -- low infant mortality and long lives means
that people spend less and less of their time child-raising, and more time living independently.
That causes even less desire to bear raise children, and the cycle is amplified.
Combine that with freedom from hunger, disease, aging. Basically, many of the Nalu,
especially those over 400 years old, are tacitly accepting the end of their culture.
So, by the time of the nukes and global telecomms (which are, in some ways, are just as threatening),
the Nalu are still regarding humans emotionally as animals, but intellectually, they have started to fear them.
But at this point, many of them are basically unmotivated to do anything. The majority prefer not to think about it too deeply, believing that in case of confrontation with the "Zve", their plasm ability will protect them (as it can -- a Nalu out of phase can survive even a nuclear explosion), but really preferring not to test it.
So, isolation and secrecy seems the best way to live out their lives in peace. And soon enough (by Nalu standards),
it won't matter any more.
But, of course, there are exceptions :-)