One thing i like about Halo Universe is that most of the things on it are possible in real-world, unlike most sci-fi series.
Discuss the realism of technologies and stuff in the Halo Universe.
[Edited on 05.10.2011 2:59 PM PDT]
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probably due to the outer colonies being more 'isolated' from the rest of human space, thinking 'why should they control our colonies, when they are X light years away?!...' and the rest will happen by itself! would also guess the outer colonises (newest ones) will be less developed than the inner colonises, another reason for the outers to feel 'hard done by', adding more fuel to the fire.