One key problem... much of the world's population lives in nations socially incapable of supporting nuclear power, or with governments that cannot be trusted wi

One key problem... much of the world's population lives in nations socially incapable of supporting nuclear power, or with governments that cannot be trusted with significant quantities of nuclear materials due to proliferation, or both. Advocacy of nuclear has a bad tendency to think of "the world" as the US, Europe, Japan, and China. Any solution that aggravates the haves/have-nots divide is going to cause problems.