The ‘Blue Marble Effect’ is nothing less than human consciousness raising:
“When we originally went to the moon, our total focus was on the moon: we weren’t thinking about looking back at the earth,” said David Beaver, the cofounder of the Overview Institute, paraphrasing an astronaut in the documentary. “But now that we’ve done it, that may well have been the most important reason we went.”
Watch the following 20 minute documentary, and be moved. Further discussion is available from Scientific American here.