The healthy optionThe Sisters of Mercy Health System is staying true to the principles of its founders by adopting 21st-century management and delivery approaches, Ruari McCallion learns. The Sisters of Mercy were founded in Ireland at the turn of the 19th century by Catherine McAuley, a young woman who inherited a fortune from her adoptive parents and put it to work rendering support, shelter, care and education to the poor and disadvantaged of Dublin. The Sisters of Mercy Health System (SMHS), based in St.