Our ego convinces us that we can overcome the impossible but the universal law of probability balance says otherwise. The degree of technology required for us to go to and permanently colonize another heavenly body has within it the seeds of our total destruction.
Indeed, the law of probability balance says creation at some point in time must be offset by destruction. As creature of the universe we cannot escape this most fundamental law. Thus either the environmental damage that our technology has bought about or the vast stockpile of nukes waiting to be turned loose will do us in long before we can make some great escape from earth.