Question

what was the concept of modern state?​

Answer 1

The concept and practices of a modern state, in which a centralised power exercised soviergn control over a clearly defined territory,had been developing over a long period of time.

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Answer 2

Answer:

The modern state is a state that has the power in a centralized manner. In addition to this, the sovereign control is exercised by the people over a territory is defined precisely in an accurate manner. You can say that today's government system in democratic countries is following the modern state system.