Compared to previous centuries in Europe, the 20ᵗʰ century was less violent internationally because of the emergence of the League of Nations and the United Nations.

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The 20th century was characterized by two world wars, numerous regional conflicts, and the Cold War, which led to the development and use of weapons of mass destruction. While the League of Nations and later the United Nations attempted to promote peace and prevent conflicts, they were not always successful in their efforts.

Compared to Previous Centuries in Europe, the 20ᵗʰ Century Was