This assumes that we will still be traveling in rockets in a linear fashion in space-time. What if technology evolves, we are able to create worm holes that have an opening near us and somewhere else in a far away local group?

40000 lives saved ! What about the 2-3 million driver jobs lost? How many of these will die of hunger? How many of these will commit suicide? And how many of these jobless folks will end up going postal, picking up a gun and shooting others. Nobody seems to do a complete end-to-end analysis of the cost/benefit of…