Samuel Huntington talked about the "clash of civilizations." This concept states that a lot of the conflict that goes on in societies across the world has to do with culture. Now, this clash with CULTURE does not mean that it is a clash of "boundaries" such as countries, states, or continents. There could be many cultures in a single country and that could in itself cause conflicts. This theory has been proven to be true in many ways. However, I see how this theory could have it's downsides.
This concept has the potential to divert our attention from the shared fundamental concerns of all states, such as strategic, economic and national interest. This common platform of understanding is lost and that can end up leading to a misunderstanding the "other".
What is dangerous about the theory is that it is self fulfilling. People who believe in this "clash" are bound to act in a hostile manner toward the perceived "other," which will essentially create the clash. The theory only provides ammunition to extremists on both sides who will create conflict rather than striving for cooperation and eliminating this clash. It encourages us to seek out our differences rather than our similarities.
Perhaps the real clash is between those who believe in the inevitability of dialogue and those who profess and act upon this idea of a clash of civilizations. The sides in this clash are determined not by religion, culture, or civilization, but by moderation on one side and extremism on the other.