International Relations/Evolution of the Modern State System

Sumerian City State - Ur, Kish, Karsa, Lagash, etc. (30 in number, existed before 2500 B.C.)
Greek city-states
Pre-modern states; not nation states but empire-states which did not represent the wishes of the people - Roman empire
End of 30 years' war, treaty of Westphalia in 1648 and the acknowledgement of other states
Italian mercantile city states
French Revolution and development of ideas of self-determination