Here is a possible reason for the success of Mormonism and it's ability to attract English immigrants.

A really horrible life.

Archaeologists who worked on an early 19th-century burial site at the New Covent Garden market in south-west London where about 100 bodies were found have said that they contain evidence of arduous working conditions, a noxious environment, endemic diseases, physical deformities, malnutrition and deadly violence.

The burials offer an extraordinary glimpse into life in early industrial London, between the 1830s and 1850s. They show the harshness of life for the industrial poor that Charles Dickens described so acutely in his classic novels.