Emergent gravity: The thermodynamic key of space-time?

We consider some aspects of the inciting relation between gravity and thermodynamics and describe how this has led to propose that gravity is not a fundamental interaction, but an emergent phenomenon with a statistical thermodynamic origin. To develop this idea, first, we briefly review the main aspects of black hole thermodynamics and the Unruh effect. Then, we present the work of T. Jacobson and outline the idea proposed by E. P. Verlinde that gravity is an entropic force. Finally, we discuss some of the consequences that follow from considering gravity as an emergent phenomenon and how this new concept may be important to solve some problems that current gravity models have failed to solve.