Perhaps. But Kenneth Waltz, along with realism and neorealism, were utterly discredited by the end of the cold war and 9/11. If the cold war was bipolar, and we are today living under the unipolarity of the United States, I would argue that there is much more 'stability' today, than there was before 1989-91.it is called the Balance of Power, and is a very good point to raise.