Anthropologists now believe Homo sapiens succeeded, unlike other members of the genus Homo, Neanderthals and Cro-Magnon for example, because our brains had a greater capacity for speech and language.

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In another cut of the data, we recently ranked the findings on four criteria to find the Friendliest Countries: ability to befriend locals, success in learning the local language, capacity for integrating themselves into the community, and ease in which they fit into the new culture.

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All are written in the social-realist style, and all are marked by Mr Wilson's gift for dialogue, his feeling for language and his capacity to evoke unsentimental emotion.

ECONOMIST: August Wilson