So long as the planet of the population keeps going up and the population density of cities increases the chance of multiple millions of people being killed in a single military exchange keeps escalating.
I'd like to think we can keep a lid on things and work it out in a more civil manner, economically it makes more sense, but you know, dictators don't really care about economics as much as they do ego.
A future war here might make every war we've had in the sandbox lately look like a summer barbecue.