Authors with Theologian Profession Leonardo Boff theologian Ole Hallesby theologian Marin Mersenne theologian Miroslav Volf theologian Michael Servetus theologian Karl Rahner theologian Karl Barth theologian John Calvin theologian Justin Popovic theologian John Wesley theologian John Courtney Murray theologian John Baillie theologian Jean Danielou theologian Jacques Leclercq theologian Stanley Hauerwas theologian Walter Brueggemann theologian Yusuf al-Qaradawi theologian Thomas Cartwright theologian Richard Hooker theologian Reinhold Niebuhr theologian «123»