Uppaluri Gopala Krishnamurti (9 July 1918 – 22 March 2007), better known as U.G., was an Indian speaker who questioned the state of enlightenment as a real thing. Instead of using the word "enlightenment", he used the terms "calamity" and "natural state". He claimed that the return to the natural state is a rare, acausal, biological occurrence, an event which he referred to in his own life as “the calamity”. Because of this, he discouraged people from pursuing the “natural state” as a spiritual goal.