I choose World War II.
It was not just about armies fighting each other but also concerned the
decimation of an entire race of people.
During WWII, the Germans tried to
wipe out the Jews in Europe and almost succeeded had not the allies arrived and
liberated the camps where the Jews were held. This also led the establishment of international laws to prevent genocide and convict those who perpetuate it.
The Patriot Act was highly controversial because it restricted and limited many American freedoms, such as Habeas Corpus. It also enacted a number of surveillance measures.
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The answer to your question is King John.
Between 25 and 50 percent
