WASHINGTON—What was once billed as the greatest democratization of information in the world’s history has led in the last decade to might be called the personalization of media, in which one’s politics can be reinforced by commentators all but guaranteed to stand at a rigid edge of the political spectrum. The result: an explosion in the availability of information has coincided with historic levels of political polarization. (A Duke University analysis released this year of US Senate voting patterns said the current level of partisanship is the greatest since the early 1900s.) While many factors have led to more partisanship, analysts said that ideological media outlets have both contributed to the divide and hardened the battle lines. Full story for BostonGlobe.com subscribers.
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