Flight From Earth and Stephen Hawking's Final Warnings

     Stephen Hawking's issued final warnings to mankind before his death. He said humans must leave earth in the next 200 years if they want to survive. Others, including Elon Musk, are seeking to colonize other planets.
      First, there is no place to go. Even if there was a place to go, a species that ruins a planet as biologically rich and diverse as earth does not deserve a place to go.
      There is no future for mankind if people cannot stop poisoning and destroying this planet. There is no future if the nuclear demon is not kept in check.
      Artificial intelligence, unlike nuclear weapons and environmental degradation, is not a real and immediate threat.
       Rather than seek flight from earth, it is better to fight for this planet, its biological diversity and health.