I don’t know about Niven or Bova, but Pournelle writes/blogs prolifically online and answers emails, so one can just look: http://www.jerrypournelle.com/slowchange/SPACECOVER.html
He seems pretty unhappy at the stagnation, and hopes the X Prizes may help.
I don’t know about Niven or Bova, but Pournelle writes/blogs prolifically online and answers emails, so one can just look: http://www.jerrypournelle.com/slowchange/SPACECOVER.html
He seems pretty unhappy at the stagnation, and hopes the X Prizes may help.