What factors contribute to a change in world order? Why is a world order challenged?

With Kissinger’s ideas on world order in mind answer the following questions:
What factors contribute to a change in world order? Why is a world order challenged?
Lessons of history question: After reading about the different conceptions of world order, such as the European and Asian systems, what attributes of world order seem most important for stability and prosperity?
What is wrong with the present world order? What are the biggest challenges?
What would Kissinger think about a Gratian regime based world order; Kantian small republics; a more utopian world government or a Marxist classless and stateless utopia?