Now back on topic, about bringing Democracy to a country it all depends on the political culture.
The most important study conducted about political culture was done by Gabriel Almond and Sidney Verba, in 1963: "The Civic Culture"
They tried to show that the stability of democratic systems depends on the opinions of the populations. In countries where the population supports the democratic principles and values democracy appears to work better than in countries were this is not the case. (Quite obvious)
Almond and Verba distinguised three possible forms of political culture.
1) Parochial political culture: There is no distinction between the political domain and other domains of society. The leader of the local community is also the religious, jurdic, political and military leader (starts to ring a bell right?)
2) Subject polititcal culture: in this system the ordinairy civilian has very little or no power, they are only subjects, usualy to an absolute monarch. The only thing that is accepted from the citizens is that the obay the law.
3) Participant political culture: Here it is expected that the citizens are actively participating in political and social events. They do not only participate in elections but also in other ways.
Now based on these three archtypes Almond and Verba made the most ideal political culture called "The civic culture" which means the citizens are not too active, they respect the laws even tho they do not always like them. But they are expected to participate to a serious extend.
Now this theory is not without critism (which I will spare on everyone)
However if we do accept, which is not proven, that there is a causality between political culture and stable democracy. Iraq was indeed a democracy too far.