Full Idea
Natural kind structures go all the way down to the most basic levels of existence.
Gist of Idea
Natural kind structures go right down to the bottom level
Source
Brian Ellis (The Metaphysics of Scientific Realism [2009], 3)
Book Reference
Ellis,Brian: 'The Metaphysics of Scientific Realism' [Acument 2009], p.59
A Reaction
Even the bottom level? Is there anything to explain why the bottom level is a kind, given that all the higher kinds presumably have an explanation?