Full Idea
If nature makes nothing without some end in view, nothing to no purpose, it must be that nature has made plants and animals for the sake of man.
Gist of Idea
If nature makes everything for a purpose, then plants and animals must have been made for man
Source
Aristotle (Politics [c.332 BCE], 1256b20)
Book Reference
Aristotle: 'Politics', ed/tr. Sinclair,T.A. /Saunders,T. [Penguin 1992], p.79
A Reaction
That was a rather fast move! If a tiger eats a man, how do we explain that? Why are some plants poisonous? Pebbles on a beach seem to have no purpose.