If the Earth was a closed system it could be indetified as having finite resources. Unfortunately for the authors of the story, that basic premise is false. ET

If the Earth was a closed system it could be indetified as having finite resources. Unfortunately for the authors of the story, that basic premise is false. ET solar radiation is 1367 watts per square meter [1]. Added to that the (current) high interest in space exploration/exploitation and I think we can put this theory to bed. [1]http://en.wikipedia.org/wiki/Sunlight http://en.wikipedia.org/wiki/Sunlight