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What would the purpose of surviving be if everyone was miserable? thus, achieving happiness, not survival, is the goal of humanity.
Humanity only recently overcame the clutches of natural selection and so nearly all of our desires exist to ensure survival. Where we stand apart from other species is instead of pleasure being the motivation to survive, we can seek pleasure for its own sake. i.e. fine dining.
There's no evidence that "humanity" has a goal. Individual humans have goals.
Natural selection has evolved all animal species to do so.