Effective altruism has suffered a blow, but the extreme ideas surrounding it have infiltrated some of our most powerful organisations ...

This story has been updated to correct the location of one event. Through Sunday, Dec. 29 - 11 a.m. to 5 p.m. Thursdays through Sundays Ice House Gallery, 138 Independence St., Berkeley Springs, W.Va.

The event takes place at Berkeley Green, Gloucestershire Science & Technology Park, Berkeley, Glos., GL13 9FB. See Course page for more details.

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