Full Idea
It was Frege who first showed how the idea of abstraction could be put on a rigorous footing.
Gist of Idea
Frege put the idea of abstraction on a rigorous footing
Source
report of Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884]) by Kit Fine - Precis of 'Limits of Abstraction' p.305
Book Reference
-: 'Philosophical Studies' [-], p.305
A Reaction
This refers to the crucial landmark in philosophical thought about abstraction. The question is whether Frege had to narrow the concept of abstraction and abstract entities too severely, in order to achieve his rigour.