The immanent ontology of human intelligence is existentially insignificant. A search through what we presuppose to exist in use of human intelligence does not uncover why we exist. Not even my focus on the presuppositions of moral thinking uncovers any purpose for human life. Use of moral language, which is a cultural universal, presupposes items I have uncovered as authoritative morality. Some of these are, the notion of authoritative commands, a sense of the transparency of moral and immoral choice, and I think the notion of moral harm which I am promoting as a cultural universal. For more detail see Core Concepts of Authoritarian Morality.
To be sure, in my book and in a recent post I proposed that duty for the sake of duty can be taken as a purpose for life. See: Gibt es kein Gott nur die Pflicht steht gegen das Nichts I admit, though, that living for the sake of doing one’s duty may seem to be a choice to be obsessive compulsive . What’s the point of it?
The existential insignificance of the presuppositions of use of human intelligence are the presuppositions of daily life. It is daily life about which we have existential anxiety. The rich complex of what is presupposed in daily life is simply part of what we worry about as being pointless – sound and fury signify nothing. If humans become extinct will what is presupposed vanish?
The presuppositions of daily life do not explicitly give an idealist ontology that everything is in some sense mental. A cultural universal, I submit, is a distinction between mind and body – the mental and material. At least, following Kant, there is always a distinction between human thinking and things in themselves apart from human thinking. But positing things in themselves apart from ourselves does not lend significance to ourselves.
I hope these remarks are not too obscure. I offer them as motivation to moving on to what I have called transcendent ontology in the philosophical struggle against nihilism. However, before moving on to transcendent ontology, we must appreciate the immanent ontology of human intelligence as the gold mine of philosophy.