Ratzinger had examined the works of several theologians accused of relativism, such as Jacques Dupuis and Roger Haight, and found that many, if not all, were philosophically inspired by Hick.
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Sans Pareil was used on the railway until 1844, when it was sold to the Coppull Colliery, Chorley and used as a stationary engine until 1863 when it was presented to the Science Museum by John Hick.
French theologian Henri Blocher criticised the universalism of John Hick's theory.