Wars both actual, and wars that have never happened have driven human development greatly in the last century alone.
In comeptition with each other for example. The United States and Soviet Union made many breakthroughs in human space expolaration and things such as the U.S. Interstate Highway System, and the Moscow Metro System for example both had military applications in Mind for the mere potential of war when they were constructed.
Other Outcomes of this example of military build up and tension includes the development of Earth Mapping satelites, and GPS, also the use of warships as Humanitarian aid platforms, as demostrated via the United States Navy in the 2004 Tusanmis diaster and treament of casualities and rescue operations after Hurricane Katrina. (the debacle that it was).
Many of the ships involved were built for a power struggle during the Cold War, and have capabilities to support thousands of crew and personel as well as launch aircraft around the clock.
These primarly military applications in example helped treat and feed victims and supply them with fresh water as they were transported to other refugee and support areas.
In short the strive of human beings killing each other has taken us to great heights, and many of the things we don't think about today, or the way we do things, have their orgins somewhere drenched in conflict, or the tension surrounding potential conflict.
"This conjunction of an immense military establishment and a large arms industry is new in the American experience"- Dwight D. Eisenhower , Jan 17,1961.