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The Law of War and Peace

Hugo Grotius

Natural law / international law

It is the cornerstone of international and natural-law theory, the text from which modern thinking about lawful war descends.

Synopsis

A foundational treatise arguing that natural law binds nations and individuals even in war, establishing rules that hold without a common sovereign.

Core passage idea

Paraphrase · Public domain

There is a law among nations rooted in reason and human sociability that obliges states even in war, independent of any ruler's command.

It grounds international order in shared moral reason rather than mere power, founding the modern law of nations.

To avoid a bubble

Pair with E. H. Carr, The Twenty Years' Crisis.

Reading note

It is dense and example-laden; track the core claim that moral law precedes and limits sovereign force.

Best paired with

E. H. Carr, The Twenty Years' Crisis

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