homophily
 n.— «Sociologists have a term for this birds-of-a-feather-flocking-together phenomenon: Homophily. Some explanations for America’s political homophily suggest that a president who is determined to be a uniter might be able to help the nation reverse course; other theories suggest that the forces of polarization are beyond the powers of any individual to influence.» —“Why the Ideological Melting Pot Is Getting So Lumpy” by Shankar Vedantam Washington Post: Department of Human Behavior Jan. 19, 2009. (source: Double-Tongued Dictionary)

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