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I, on the other hand, am more often tempted to consider humanity a metastatic tumor on the Earth's biosphere or, perhaps, with Stephen Hawking, as" just a chemical scum on a moderate-sized planet, orbiting around a very average star in the outer suburb of one among a hundred billion galaxies." 2 But, for all our faults, one cannot accuse our species of lacking self-esteem, as most of our traditions exalt humans above all other things on, over, or in Earth.