Article/Publication Details

Why Popper’s Critical Dualism Should Be Understood Decisionistically

(Original title: Proč chápat Popperův kritický dualismus decisionisticky)
Filozofia, 2020, vol. 75, No 6, pp. 474 - 489.
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There is not much in The Open Society to suggest that Karl Popper was a moral objectivist. Yet, that is exactly what he himself claimed later in life. Was the widespread “decisionistic” reading of The Open Society just a grand misunderstanding, or did Popper change his metaethical views without acknowledging it? I give reasons as to why we should hold the latter to be true. I also argue that even were the former the case, decisionism would still be more compatible with the open society ideal.


Critical dualism, Is-ought, Karl Popper, Moral objectivism, Moral relativism, Open society