Civilization exists by geological consent subject to change without notice.
There have been only 268 of the past 3 421 years free of war.
You do have to change things as warfare changes.
I worked for the Office of Management and Budget in the White House on nuclear energy policy. But I decided it would be much more fun to have a specialty food store so I left Washington D.C. and moved to the Hamptons. And how glad I am that I did!