For example the efforts to implement a democratic system in post-colonial Africa, darling of the liberal left, has failed spectacularly, and I suspect always will due to the way those people naturally organise. I actually think Middle Eastern peoples are more capable of embracing it, as Turkey showed for a while, but the religious practices of this region are a clear impediment. The people in these countries have to want what you can offer; you just can't tell them what's best for them.
Many people have this dogmatic belief that humanity is one, and thus consequently believe that an essentially Anglo-Saxon idea can be equally successful when applied to radically different cultures. There is not much evidence for this, but good luck persuading anybody on here.