What can Classical Gravity tell us about Quantum Structure of Spacetime?

Several features of classical gravity, combined with the existence of Davies-Unruh temperature of horizons, support the following paradigm: Gravitational field equations in a wide class of theories, including Einstein's theory, should be viewed as describing the thermodynamic limit of the statistical mechanics of (as yet unknown) atoms of spacetime. I present the conceptual evidence for this emergent paradigm and discuss several facets of this approach.