After secession happened and fighting broke out, conspiracy theories multiplied, most of them crazily implausible, like the one in an 1863 exposé called Interior Causes of the War: The Nation Demonized and Its President a Spirit-Rapper. The author, a “resident of Ohio,” said it was no coincidence that abolitionism and the craze for communicating with the dead had taken off simultaneously during the late 1840s and 1850s. The spirits, dead people, “have a magnetism peculiar to themselves, fired with vengeance [and] hatred.” In other words, ghosts and their living American interlocutors—the
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