David Hume

David Hume (1711-1776) is the philosopher who told us what we cannot know — and meant it. His Treatise of Human Nature (1739), written at twenty-eight, contained the most devastating critique of causation and the self ever put to paper: we never observe causation directly, only constant conjunction — habit creates our belief in cause and effect, not reason. His problem of induction remains the central unsolved problem in philosophy of science. His essay "Of Miracles" (1748) argued that no testimony could outweigh the evidence of natural regularity, demolishing the evidential basis of revealed religion. Kant said reading Hume "woke him from his dogmatic slumber." Hume died calmly in 1776, refusing to panic about the afterlife he had spent his career rationally dismantling — the most cheerful sceptic in philosophical history.