Cold war has replaced actual war. with the creation of the nuclear bomb an all out war comparable to one of the world wars just wouldn't happen. Countries would be to scared to start a major conflict because they don't want to literally be wiped off the map. so since an actual war is not an option then there is diplomacy/UN/talking it out but that in my eyes will just never work. Why? the amounts of bureaucracy involved in stuff like that would make the whole process take forever and the amount of bullshit politicians can come up with grinds the system to a halt. So now we are left with a show of force, cold war. we have more guns, tanks, boats, planes, secret bases, soldiers, nukes and ninja assassins than you do so we win. Thats what could replace actual war, in my opinion atleast.