Consider a moderate progressive who is partly conservative. She hears conservative language and conservative arguments over and over, day after day for years—in the media or with friends or both. The conservative language will activate the conservative moral system, making it a bit stronger every time the language is heard. As the conservative circuitry in her brain becomes stronger (the synapses strengthen), the more likely it is that her views on issues will change from progressive to conservative. The result may be a shift within the brain from a person who is partly conservative to a
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