Bringing diversity to homogenous nations is the answer to the issue of achieving peace in the 21st century. It can be argued that if homogenaity works for a particular society, then why change what is proven to work? Some of the most efficient and prosperous societies, such as Japan, are in fact homogenous. However, we have also seen various cases where a homogenous society leads to cultural, ethnic or religious clashes. For one thing, a homogenous society can be restricting to one's beliefs and what is accepted. There are still many nations that harbor the belief that diversifying their country can/will lead to negative repercussions and unwanted changes in an already established culture. While this anxiety is legitimate, the long term result can be highly influential and set a positive example for other homogenous nations. The process of bringing diverse people to interact and live with each other is tedious and requires much cooperation and time. As the saying goes, "you can lead a horse to water, but you can't make it drink," the same holds true for bringing diverse people together and making them accept one another right away.
Even the most homogenous nations are subject to change somewhat over time and become more diverse so sooner or later these nations will need to come to terms with homogenaity. While there will always be one issue or another between two or more groups of people, diversity is a step in the right direction. Diversity, like homogenaity, cannot solve everything. Although homogenaity is still a concept embraced by countries like Japan, diversity allows new oportunities between countries and can improve international relations, a ceoncept key to achieving peace and stability. I think it is wrong for nations, such as North Korea, to isolate and limit itself from other societies, such as that of neighboring South Korea (North Korea is currently in a state of total isolation as well as economic despair due to an extreme homogenous society). In order for greater peace to be reached, it is imperative that societies let go of deeply rooted feuds and cultural tensions.