(This article is about the British organisation. For other uses, see Christian Social Union.) The Christian Social Union (CSU) was a social gospel membership organisation associated with the Church of England. The group was established in 1889 and dedicated itself to the study of contemporary social conditions and the remedying of poverty and other forms of social injustice through public mobilisation to alleviate the same. The organisation was terminated through merger in 1919, becoming part of the Industrial Christian Fellowship (ICF).