Religion was a battleground during this era, with the Nonconformists fighting bitterly against the established status of the Church of England, especially regarding education and access to universities and public office. Penalties on Roman Catholics were mostly removed. The Vatican restored the English Catholic bishoprics in 1850 and numbers grew through conversions and immigration from Ireland. The Oxford Movement was also occurring around this time, which would draw in new converts to the Catholic Church; among these was John Henry Newman. Secularism and doubts about the accuracy of the Old Testament grew as the scientific outlooked rapidly gained ground among the better educated. Walter E. Houghton argues, "Perhaps the most important development in 19th-century intellectual history was the extension of scientific assumptions and methods from the physical world to the whole life of man."