Not sure what TheWillowOfDarkness meant by "causal unity in the world"
What I meant was that Nietzsche attacked the presuppositions behind objective causal logic underpinning the natural sciences.
"Forgive me if I don't place what he might have objected to in his future in the same category."
I accept your reluctance. But I should just note that my claims concerning the deficiencies in the thinking of philosophers who came after Nietzsche with respect to his ideas are echoed and supported by writers such as Deleuze, Heidegger, Derrida and Rorty, If there is a causal unity in the world for Nietzsche it is that of Will to Power, which posits a radical perspectivalism and rejects any notion of science as progress toward truth or truth as correspondence with reality.
" It is no more than a moral prejudice that
the truth is worth more than appearance; in fact, it is the world’s most
poorly proven assumption. Let us admit this much: that life could not exist
except on the basis of perspectival valuations and appearances; and if,
with the virtuous enthusiasm and inanity of many philosophers, someone
wanted to completely abolish the “world of appearances,” – well, assuming
you could do that, – at least there would not be any of your “truth”
left either! Actually, why do we even assume that “true” and “false” are
intrinsically opposed? Isn’t it enough to assume that there are levels of
appearance and, as it were, lighter and darker shades and tones of appearance
– different valeurs, to use the language of painters? Why shouldn’t
the world that is relevant to us – be a fiction? And if someone asks: “But
doesn’t fiction belong with an author?” – couldn’t we shoot back: “Why?
Doesn’t this ‘belonging’ belong, perhaps, to fiction as well? Aren’t we
allowed to be a bit ironic with the subject, as we are with the predicate
and object? Shouldn’t philosophers rise above the belief in grammar?
With all due respect to governesses, isn’t it about time philosophy renounced
governess-beliefs?” –
The world with which we are concerned is false, i.e., is not fact but fable and approximation on
the basis of a meager sum of observations; it is "in flux," as something in a state of becoming, as
a falsehood always changing but never getting near the truth: for--there is no "truth" (1901/1967).
Will to Power."
"We should not erroneously objectify
“cause” and “effect” like the natural scientists do (and whoever else thinks
naturalistically these days –) in accordance with the dominant mechanistic
stupidity which would have the cause push and shove until it “effects”
something; we should use “cause” and “effect” only as pure concepts,
which is to say as conventional fictions for the purpose of description and
communication, not explanation. In the “in-itself ” there is nothing like
“causal association,” “necessity,” or “psychological un-freedom.” There,
the “effect” does not follow “from the cause,” there is no rule of “law.”
We are the ones who invented causation, succession, for-each-other, relativity,
compulsion, numbers, law, freedom, grounds, purpose; and if we
project and inscribe this symbol world onto things as an “in-itself,” then
this is the way we have always done things, namely mythologically."