Spacetime Substantivalism and Einstein's Cosmological Constant

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Baker, David
conference paper description
I offer a novel argument for spacetime substantivalism: we should take the spacetime of general relativity to be a substance because of its active role in gravitational causation. As a clear example of this causal behavior I offer the cosmological constant, a term in the most general form of the Einstein field equations which causes free-floating objects to accelerate apart. This acceleration cannot, I claim, be causally explained except by reference to spacetime itself.