Rather than shuttering themselves in their studies, the sentimental savants of Enlightenment France imagined themselves to be a new sort of public figure: learned men and women whose happy home lives enabled, rather than constrained, their intellectual work. Eager to model themselves as individuals of virtue and sentiment, philosophers flaunted their seemingly idyllic family lives. They collaborated with their spouses and children, showcasing the family home as a productive intellectual space. They even practiced an intimate brand of empiricism, testing ideas about education and inoculation on their own families and advertising their successes in print. Sentimental Savants reveals how sentiment and reason interacted in the eighteenth century to produce new kinds of knowledge and new kinds of families.