War has been more common than peace, and extended periods of peace have been rare in a world divided into multiple states
Donald KaganAll comparisons between America's current place in the world and anything legitimately called an empire in the past reveal ignorance and confusion about any reasonable meaning of the concept empire, especially the comparison with the Roman Empire.
Donald KaganI can see that you [Bruce Cole] are a true historian because you really always ought to ask that question about anybody at a different place or a different time: What's the same and what's different?
Donald Kagan