In this video I tell you about the five currently most promising approaches to a theory of quantum gravity that physicists are presently pursuing. These are: string theory, loop quantum gravity, asymptotically safe gravity, causal dynamical triangulation, and emergent gravity. I also explain why quantizing gravity per se is not actually the problem. The real problem is that the naive, perturbative, quantization is not UV-complete. I also briefly tell you why I think that solving this problem is so important. You can help finance my videos by donating here: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=QZ6QCBQYUMJEG&source=url