Falko quoted The Dark Forest by Cixin Liu
One consequence of nuclear technology was that it allowed a country of just a few million people to pose a substantial threat to one with a hundred million, something that at one time had been practically impossible. One of his key points was that the advantages of a large country were only truly advantageous in low-technology eras and would ultimately be weakened by the swift pace of technological progress, which would meanwhile enhance the strategic weight of small countries.
— The Dark Forest by Cixin Liu (Page 101)