Men at first unduly multiplied the names of individual things, owing to their failure to know the genera and species, but later made too few genera and species, owing to their failure to have considered beings in all their differences.
Gist of Idea
Men started with too few particular names, but later had too few natural kind names
Jean-Jacques Rousseau (Discourse on the Origin of Inequality , Part I)
The fact that two leopards differ is not a good enough reason to assign them to two different general terms. Adjectives can do all the necessary modification. The single general term acknowledges something important.
Rousseau,Jean-Jacques: 'The Basic Political Writings', ed/tr. Cress,Donald A. [Hackett 1987], p.51