  Perhaps the greatest problem with realism in international relations is that it has a tendency to slip into its extreme version, which accepts any policy that can benefit the state at the expense of other states, no matter how morally problematic the policy is. Even if they do not explicitly raise ethical questions, in the works of Waltz and of many other of today’s neorealists, a double ethics is presupposed, and words such realpolitik no longer have the negative connotations that they had for classical realists, such as Hans Morgenthau.