But the advent of New Labour transformed Diane Abbott from being a youthful radical in opposition to an often uncomfortable fellow-traveller.

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Mr Podhoretz parted ideological company with them as he gradually metamorphosed from a left-winger into a cold-war warrior and Reaganite fellow-traveller, and he cannot now forgive them for failing to follow where he led.

ECONOMIST: New York opinion-makers

Those whose minds never consider their fellow traveller are not bad but disabled, Mr Baron-Cohen argues.

ECONOMIST: Morality and the brain: Medical diagnosis of malfeasance | The