Featured series 
Tag: Common knowledge
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Nation & World
Understanding common knowledge
A new study examines how different kinds of shared beliefs can affect how people cooperate, and how people use common knowledge, a type of shared understanding, to coordinate their actions.
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Nation & World
On the side of the angels
In his latest book, psychologist and linguist Steven Pinker cites data to show that the world is becoming far more peaceful than you might have thought.
