CEVAP:

The International System is one of the core concepts in the field of International Relations. A “system” is either a whole or a network consisting of multiple units that interact within the framework of defined rules.

We can elaborate on this general definition to specify the core features of the international system. According to K. J. Holsti, the international system is “any collection of independent political entities -- tribes, city states, nations or empires -- that interact with considerable frequency and according to regularized processes” (Holsti, 1995:23).