Perhaps the best motivation for going to Mars is political. It is obvious that no single nation currently has either the will or the resources to do it alone, but a consortium of nations and space agencies could achieve it within 20 years.
“You must in all Airs follow the strength, spirit, and disposition of the horse, and do nothing against nature; for art is but to set nature in order, and nothing else.”
“Churchill knew the importance of peace, and he also knew the price of it. Churchill finally got his voice, of course. He stressed strategy, but it was his voice that armed England at last with the old-fashioned moral concepts of honor and duty, justice and mercy.”