The Second Great Awakening attracted hundreds of converts to new Protestant denominations thus led to a period of antebellum social reforms and emphasis on salvation by institutions. The awakening enrolled millions of new members leading to the formation of new denominations. The awakening was a reaction against deism, skepticism, and rational Christianity through evangelism.
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Because the diseases were unknown to them, they spread easily and could kill off thousands of their kind.
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no it was not because they could've just fought each other instead of us killing a bunch of innocent people :(