Arnold A. van Ruler (1908-1970) was a major Dutch Reformed systematic theologian, based at the University of Utrecht in The Netherlands.

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Ernst M. Conradie (1962-) is Senior Professor in the Department of Religion and Theology at the University of the Western Cape in South Africa. He is the series editor of a series of twelve envisaged edited volumes in the field of Christian ecotheology, entitled An Earthed Faith: Telling the Story amid the "Anthropocene".