This is an ongoing debate on KOW, but it sort of matters. I agree with David (in the comments below) that this century could be a very bloody one. But I was drawn to the provocative article David linked to, which complains:
‘our militaries are still structured to fight an industrial battle against a nonexistent Soviet enemy, and the political-military way of thinking about using force is still based on models of industrial war.’
The Soviet enemy may not exist. But states wielding military force aggressively, even irrationally, will continue to exist for some time, or will return sooner or later. Being prepared to deter and respond to conventional agressors did not become an eccentric or redundant task in 1989. In the time between then and now, Iraq invaded Kuwait, Ethiopia invaded Somalia, NATO attacked Serbia, America attacked Afghanistan and Iraq. In the final decade of the Cold War, Argentina invaded the Falklands and Iraq invaded Iran. These kinds of conflicts may be receding, but the dangers in even one are sufficiently serious to bear preparing for and, if possible, preventing.
To be sure, nuclear weapons, costs, the memory of past interstate wars and other things mean that it remains an activity bound to make many nervous. But part of the task of the US as hegemon should be to keep it that way, rather than falling prey to the delusion of ‘full spectrum dominance’ and the trap of endless, unwinnable expeditionary wars.
Moreover, things might change. To assume the obsolescence of state threats from a recent tendency for fewer, less decisive interstate wars in the past twenty years would be an unfortunate case of ‘presentism.’
So personally, I’m still not convinced that we should overhaul our militaries or states fundamentally away from their core task. Clearly we need to avoid dichotomous thinking - peacekeeping, liberal intervention, or the sheer unpredictability of war make flexibility imperative. But we should resist the logic that because the strategic environment will make ‘asymmetric methods’ more attractive, therefore we have no choice but to prepare to commit our forces to expeditions to deal with them.
We have choices, and a strictly limited view of when and where military force is appropriate is a more prudent response. Grand strategy is about the avoidance of war as much as the preparation for it, and as well as sharpening our military instrument, we need to keep thinking very carefully about how it is used.
In terms of the July War, the conflict used by Ilana Bet-El to plea for a post-industrial military posture, an alternative approach is possible. That war wasn’t profoundly new, other than in the particular sophistication of Hezballa. It has never been a great idea to attack a population indiscriminately, stir up shared religious-nationalist opposition, alienate world opinion and weaken your military mystique (ask Napoleon, ask Brezhnev). Israel had the right to use some force against Hezballa’s persistent rocketing and kidnapping, but surely the wrong reaction to that war is to conclude, ‘let’s reform ourselves to fight it better next time.’ The strategic lesson should be, ‘try not to do it.’
Finally, we should avoid declaring certain forms of war ‘dead.’ We have had quite enough of this shallow, overconfident kind of futurology. As William Pitt found after 1792, and Norman Angell after 1912, this can look a bit embarrassing in hindsite.