Because if we were germs then our goal is: Survival at the destruction of entire hosts.

Goal meaning our reason for existence, and if that is the case, then the meaning of our life is not to fight each other (though we do by nature) but band together and try to make harmony of a world that is without, a harmony that only we experience and the things we like. Otherwise it's down the gutter and we move on, doing this everywhere. Asking, why ? individually, but knowing the true answer as a whole.

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