In fact, if you aren't one, it's highly unlikely you'll get anywhere. Also, notice that most of these names are from ages ago. People were joiners back then, and this is one club you had to be in to advance yourself.
Plus, it looks good to the organization to have some popular guys in it...it helps the public image. That's why they're allowed in (plus, then they're easier to control - go against what they tell you to do, and you lose everything)
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