From my point of view, the main threat to colonize other planet and survive are other humans. The paper focus on resource extraction and management. I have alw

From my point of view, the main threat to colonize other planet and survive are other humans. The paper focus on resource extraction and management. I have always give that for granted. There have been different experiences of human cohabitation. With mixed results. Mars500 [2] has been successful with a long story of experiment. Hi-SEAS has been successful [3]. But the Biosphere2 [1] was a revealing project. There was miscalculations in the project, and the team was not able to surpass the inconveniences. They split in two groups. In Biosphere2 people who had been intimate friends had become implacable enemies, barely on speaking terms. The factions inside the bubble formed from a rift and power struggle between the joint venture partners on how the science should proceed. Finally due to resource scarcity and not able to self sufficiency, the project was cancelled. In another planet, the colony can't be cancelled, they will dye. The irony of the situations is explained in game theory. Even when the best strategy is colaboration, some humans prefer far from optimal decisions. [1] https://en.wikipedia.org/wiki/Biosphere_2 https://en.wikipedia.org/wiki/Biosphere_2 [2] https://en.wikipedia.org/wiki/MARS-500 https://en.wikipedia.org/wiki/MARS-500 [3] https://en.wikipedia.org/wiki/HI-SEAS https://en.wikipedia.org/wiki/HI-SEAS