Cooperation among strangers has increased since the 1950s

Despite common concerns that the social fabric is fraying, cooperation among strangers has gradually increased in the U.S. since the 1950s, according to research published by the American Psychological Association.

Study: As cities grow in size, the poor 'get nothing at all'

Cities are hubs of human activity, supercharging the exchange of ideas and interactions. Scaling theory has established that, as cities grow larger, they tend to produce more of pretty much everything from pollution and crime ...

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