A democracy cannot exist as a permanent form of government. It can only exist until a majority of voters discover that they can vote themselves largess out of the public treasury.
— Alexander Tytler

Some numbers are well beyond human comprehension. We can talk glibly about millions and billions of this or that but we cannot intuitive grasp what they actually mean. Evolution has equipped us with fine brains but those brains never needed to deal with thousands — leave alone millions — of anything. So we have to do some mental gymnastics to get a fleeting glimpse of what very large numbers represent.
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