Taking my rambling shot at the question - we're spreading 'democracy', but what is it we are spreading when you see Hamas 'elected' as a ruling political party, etc. Hugo Chavez was 'elected'. Saddam won sham 'elections'. Some countries have elections but don't allow unapproved parties or candidates. Some countries call elections suddenly when it's convenient and some cancel elections and hold power. Even Hitler and Nazi rise to power had some origin in the electoral process.
Pure democracy has some pure meaning such as every citizen voting on every issue and you risk tyranny of the majority(as Crafty just wrote). I take 'democracy' in the spreading sense as meaning loosely some form of self rule. From our point of view I guess we are looking for a lot of good qualities in new republics based on what we value, but want it to be their idea in their own form.
So my answer is that democracy, such as the 3 national elections in Iraq, is step one in freedom, not the end-all solution. Giving people a taste of freedom and self-rule where none has existed in their lifetime is the beginning. That doesn't mean the security issue is solved or that capital markets are free or that basic freedoms will be protected or that tyranny won't return.
I just believe that the first step toward freedom is amazingly important. It was impressive to see the recently freed republics of Europe such as Poland, Romania and Bulgaria identify with the cause of Iraqi freedom. My daughter and I saw Pres. Bush up close at a campaign appearance in Oct. 2004 they day that Afghans first headed to the polls, with a 75% turnout and women included, not just rule by men, much less the taliban and al Qaeda. For me it was a quite an emotional feeling to connect the freeing of these many millions of people we've never seen or met with the choices and political efforts that we make here. In iraq, I am very proud that Saddam got a fair trial and is now dead. We didn't achieve US independence without war and outside help, and it wouldn't have happened in these new countries either without help.
Now back to bad, elected governments, such as Hamas. Democracy is ugly, but better than the alternatives. Capitalism and free markets are ugly but better than the alternatives. I grew up in a Goldwater-Reagan type Republican family in a state (Minnesota) completely dominated by the Democrat-Farmer-Labor party of Hubert Humphrey, Walter Mondale, etc. and a country run by Lyndon Johnson and huge Democratic congressional majorities. Of course it didn't seem like self rule when you keep losing elections and live under someone else's tax code and spending programs and court system. The difference was that you always knew you could change minds; you didn't have shoot the oppressors. Through 1984, Minnesota was America's most liberal state as Reagan won all the other 49. The liberal issues were the same as today IMO: reverse the tax cuts and pacify the enemy. Eighteen years later Walter Mondale was defeated in his home state and a tax cut supporting Republican took the Senate's most liberal seat of Paul Wellstone. (This year we sent a Wellstone-clone to take the other senate seat, oh well.)
My point is that the process of getting it right, from anyone's point of view, is a long, long, long process and we never quite get it right. (I see that same point made with "How could it not take decades?") In America, we didn't free slaves until seventy-some years after the bill of rights went into effect.
I was asked the same spreading democracy question previously by another friend in the same context - I think the implication was the a benevolent dictatorship might have been preferable to the actual choice of the people. In the case of Iraq, we installed the interim government of english-speaking American Paul Bremer while the first elections were scheduled. Considering the criticisms we face now, can you imagine what world and Iraqi opinion would be now if the American installed government was the permanent solution?
Now back to good government and real freedoms. Heritage makes a freedom index ranking of 161 countries. I'm sure their criteria aren't perfect, but I like the thought process.
http://www.heritage.org/index/topten.cfmSome politician suggested an 'Association of Democracies' as an international rival for the UN's tolerance for illegitimate regimes. It makes sense to me.