If a just cause exists then who cares what anyone thinks.
Well,
you clearly care what
you think or you would not have decided that you have a just cause. If opinions are irrelevant then why should yours hold more weight? I agree with much of what you say, but this point is somewhat irrational.
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War does not seem to mean what it used to. Since WWII the developed nations have in the main only fought wars of choice or proxy wars (what luxury!) We get to make cost-benefit analyses and weigh up deaths against economic or political gains and expediency - unlike the good old days where you invaded, looted and pillaged and were almost always better off (if you won). The domestic political fallout from such barbaric behaviour would be terminal in this more enlightened age.
The arguments for war are more complex: In Afghanistan there was a clear international mandate for getting rid of the Taliban and support for the capture of the leaders of Al'Quaida. Regime change was clearly a desirable objective from the point of view of most of the world (even the Iranians despised the Taliban) and at least one half of the population of Afghanistan itself - its savagely repressed female half. But in hindsight, have things changed for the better? A decade on our troops are still being blown up and the Taliban seems increasingly and paradoxically resurgent, don't these people understand that they are better off without religious extremists for leaders? The policy at present seems to be to get out and blame the Afghans if things go pear shaped.
Personally I am sceptical that a democratic revolution is one that can be forced on a population. historically, do revolutions show that change can be instantaneous and lasting? Well, the French had a revolution that was hijacked by a wannabe Emperor of Europe; almost every communist revolution worldwide was hijacked by one megalomaniac or other; nascent Italian and German democracies were hijacked by the Fascists and we all know what happened next. Democracies throughout history have been formed through lengthy periods of internal change. The British
changed their minds when they chopped off Charles the 1st's head and tried being a republic, it was centuries of internal reformation that led to our modern democratic system. The idea that you can essentially march into a country and install a democratic government
and everyone will be happy with it is a very recent one that just does not seem to be bearing fruit.
The case of Iraq is an even a more divisive one than that of Afghanistan. There is still general disagreement over whether or not we should have gone in all guns blazing in the first place. Much of the reluctance on the part of those of us who were opposed (quite aside from the fact that we did not believe the arguments regarding WMD or links to Osama Bin Laden) was that we were sceptical that invading a country could do more good than harm. Again, here we are ten years later and the jury is still out, there are a couple of million Iraqi refugees in the world and hundreds of thousands of deaths have resulted.
In Libya we assisted certain emements of the population in toppling an undesirable dictator - is this any guarantee that Libya will join the ranks of the democratic free world? Who knows. The Egyptian revolution might yet be hijacked by Islamist factions, who knows what would happen in Syria if Assad falls?
I think the lessons of the last decade is that countries get the government they vote for, and countries frequently vote for the wrong people. Forcing the vote on a people who did not make this decision for themselves does not seem necessarily to give them better options and it certainly does not make them better informed about what is in their best interests. Afghanistan is still fundamentally tribal and Iraq is still split by deep religious divides.
The lines are even becoming blurred in the case of defensive war. If an army physically invades you are you at war? Pretty obviously, yes. Ok, what if they fly military aircraft over what international law regards as exclusively your airspace and attacks you when you respond. Well if they have a seat on the UN Security Council it's called a no-fly zone. Are you at war with China if you think their hackers are routinely testing your cyber-security? If country A declares that country B is developing certain weapons and will use them as soon as it has them, is a pre-emptive strike justified?
On the bright side, look at what was achieved (eventually) in Bosnia and Kosovo, as well as in Sierra Leone. I think that we are right to decide matters on a case by case basis, generalisations are a poor basis for bloodshed and as Mise rightly points out, we also have to contimue to be pragmatic about our decisions and weigh up the benefits of what we want to achieve with a realistic understanding of what we are capable of. Not thinking very carefully about the consequences of what we do and not committing to the aftermath is precisely why we are in the current situations in Iraq and Afghanistan.