In a globalized world, individuals and communities have moral obligations towards both those in their immediate surroundings and those who are currently weaker and more meritorious. Self-interest can be aligned with nationalism and capitalism, while moral obligations can be aligned with socialism and internationalism.
The common understanding of conflict is based on organized war with tanks, planes, and uniformed soldiers, but this may not be the case. The book American Anarchy versus Chinese Control discusses a possible sci-fi scenario where American anarchy and Chinese control clash.
The importance of Singapore's model lies in their CEO founder, Lee Kuan Yew, who was perhaps the greatest leader of the 20th century. Singapore's success can be attributed to nationalism as it unifies people and stops internal conflicts.