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Romanism was a derogatory word for Roman Catholicism when anti-Catholicism was more common in the United Kingdom. and the United States
Roman Catholicism. RI has the highest concentration of Roman Catholics in the United States on a per capita basis.
Ivan Vallier has written:
'Catholicism, social control, and modernization in Latin America'
'The Roman Catholic laity in France, Chile, and the United States'