Our moral emotions—our automatic settings—are generally good at restraining simple selfishness, at averting the Tragedy of the Commons. That’s what they were designed to do, both biologically and culturally. Thus, when the problem is Me versus Us (or Me versus You), we should trust our moral gut reactions, also known as conscience: Don’t lie or steal, even when your manual mode thinks it can justify it. Cheat on neither your taxes nor your spouse. Don’t “borrow” money from the office cash drawer. Don’t badmouth the competition. Don’t park in handicapped spots. Don’t drink and drive. And do
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