According to Kenneth Waltz:

“Asking who won a given war, someone has said, is like asking who won the San Francisco earthquake. That in war there is no victory but only varying degrees of defeat is a proposition that has gained increasing acceptance in the twentieth century.” -Man, the State, and War, 1959.

Kenneth Neal Waltz ( June 8, 1924 – May 12, 2013) was a renown American scholar (political science, University of California, Berkeley and Columbia University); a veteran of WWII and the Korean War. 

Dr. Waltz was a founder of the school of neorealism, in international relations theory. In 1981, Waltz published a monograph arguing that in some cases the proliferation of nuclear weapons could increase the probability of international peace.(1)

References:

1. Wikipedia (2019). Kenneth Waltz. https://en.wikipedia.org/wiki/Kenneth_Waltz, consulted on November 1^st, 2019.