Occasionalism is generally understood as a theory that ascribes all causal power to God on the one hand and treats cause-effect relations in the world as occasions indicating the manner of divine activity on the other. This doctrine was formulated first by the Ash’arite tradition in Islamic kalam, was echoed by scholastics such as Nicolas of Autrecourt in Medieval Europe. Followers of Descartes, and particularly Nicolas Malebranche defended this theory in the modern period.

The International Society for Occasionalism is founded in 2012. It is a non-profit organization established to foster academic studies on occasionalism. This society is a common ground for scholars from different traditions to study this theory in terms of both its historical background and theoretical dimensions. Membership is free.

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