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Nationalism is a feeling of unity among a group of people, as in a sense of pride in their country.  Lack of nationalism, or a desire for new nations, was a cause for the split of countries such as [[Yugoslavia]] and [[Austria-Hungary]]. It can be considered positive, as a form of [[patriotism]], but it can also go to extremes, leading to hatred of non-members of the [[nation]] (which is often ethnically defined) and violence. Examples of this negative nationalism are the [[Nazi Party]] in [[Germany]], the ethnic conflict in the former Yugoslavia, and the current isolationist policies of [[North Korea]]. Some have also pointed to the United States' nationalism as a motivator behind its policy of preemptive strikes, highly controversial among other nations and even in the U.S. itself.

Nationalism is a feeling of unity among a group of people, as in a sense of pride in their country.  Lack of nationalism, or a desire for new nations, was a cause for the split of countries such as [[Yugoslavia]] and [[Austria-Hungary]]. It can be considered positive, as a form of [[patriotism]], but it can also go to extremes, leading to hatred of non-members of the [[nation]] (which is often ethnically defined) and violence. Examples of this negative nationalism are the [[Nazi Party]] in [[Germany]], the ethnic conflict in the former Yugoslavia, and the current isolationist policies of [[North Korea]].