] It appears that echo chambers have emerged that repeat a
] consistent message within each cluster. Ron Burt, a
] leading network expert, explains that a tightly closed
] network "amplifies predispositions, creating a structural
] arthritis in which people cannot learn what they do not
] already know". With no direct bridges between the clusters,
] these divisions are unlikely to change any time soon.

Political Patterns on the WWW - Evidence of polarization