I hope to show that supervenience and determination, as I have here intuitively characterized them, are really different expressions of the same core idea which one may make more precise in a great number of different ways, depending on the interpretation one puts on the catchall parameters “cases”, “truth of kind P”and “truth of kind S”.

Two concepts of supervenience, "strong supervenience" and "weak supervenience," are characterized and contrasted, And their major properties established. Supervenience as commonly characterized by philosophers is shown to correspond to weak supervenience, Whereas the intended concept is often the stronger relation. Strong supervenience is applied to explicate the notion of "supervenient causation," and it is argued that macro-Causal relations can be understood as cases of supervenient causation, And that causal relations involving psychological events, Too, Can be so understood.