Preemption and preventive war have a mixed history in terms of moral acceptance. The strongest condemnation dates from 1918, not 1945. Nonetheless, the world’s experiences before 1914 and since 1938 suggest that it may have to live with, and make the best of, such options.
Quester, George H.
"Two Hundred Years of Preemption,"
Naval War College Review: Vol. 60
, Article 4.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol60/iss4/4