In the first place, be related with law.
In domestic [ stable ], law is observed and, as for a principle top, sanction is generally given also to an illegal act.
To it, it is decentralization-of-authority-like [ international politics ] and the authority mechanism which gives sanction and which held legal force does not exist.
Be related [ second ] with military power.
In domestic politics, the central government monopolizes the authority of use of force, and the use of force by the other organization is punished as an illegal thing.
To it, by international politics, the authority organizations [ sovereign nation ] (for example, world government etc.) of a higher rank which monopolize use of force do not exist, but it has the authority for all the sovereign nations to use armed force.
If the organization which protects self from the threat of military power does not exist at all, international politics serves as a system of self-help inevitably.
Be related [ third ] with a sense of values.
While my one-country wife has comprehension of a certain amount of common concept, a common appropriate concept does not exist in international society.
Only the number of national could say that there is justice.
Comparison by Kenneth Waltz besides the comparison from three points of the more than depended on Joseph Nye is also consulted.
in "theory of international politics",