Complex sentence: Baruch took up residence in New York with his family in 1881, where he became a leader in the national movement to establish free public baths for urban residents and medical journalism.
Split into simpler sentences: Baruch took up residence in New York with his family in 1881. He then took up residence in New York City, and went on to become a leader in the national movement to establish free public baths for urban residents and medical journalism.