Cosmic Endowment

The cosmic endowment is Tegmark's name for the upper bound on computation the observable universe could support if all available matter were converted into optimal computing substrate—approximately 10^58 bits. The number is not an engineering target; no civilization is likely to convert all matter into computers. But the number functions as a bound, establishing the scale of what is physically possible and therefore the magnitude of what is at stake in the AI transition. The universe is 13.8 billion years old and will persist, in some form, for trillions of years. The timescale over which AI transition consequences will play out is not decades or centuries but cosmic epochs. A misaligned superintelligent system deployed in the twenty-first century could reshape the trajectory of matter and energy across the observable universe for the remainder of cosmic time. An aligned system could spread intelligence and consciousness through the cosmos on timescales that dwarf the entire history of biological evolution.