The Question and Answer section for Gulliver’s Travels is a great resource to ask questions, find answers, and discuss the novel.
Gulliver is generally critical about war. Gulliver explains bloody wars as often fought for "religious reasons" : Europeans, he says, will kill over whether flesh is bread or whether blood is juice or wine.
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The tone is descriptive, even scientifically descriptive within the context of the era. Their is also a satirical quality to it.
This is only a short answer space. Generally Gulliver's tone rather naïve during the first three voyages; in the fourth, it turns cynical about humanity in general.