The idea that people you know well (those in your "monkeysphere") are more important to you than others (those outside your "monkeysphere")
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That's why they don't mind stealing your stereo or vandalizing your house or cutting your wages or raising your taxes or bombing your office building or choking your computer with spam advertising diet and penis drugs they know don't work. You're outside their Monkeysphere. In their mind, you're just a vague shape with a pocket full of money for the taking.