actually given the choice, we would stay on this planet, and taking your view, if we do create the technology needed to leave and we don't it may be for fear of leaving, but rather for fear of going. if we do have that choice, even if one is predetermined then we have freedom
(I know you'll say it isn't but think about it for a while, if we WANT to do something, even if it will already happen, it isof our FREE will and therefore freedom)
