 Rousseau's autobiographical writings—the posthumously published "Confessions" (composed in 1769), which initiated the modern autobiography, and the unfinished "Reveries of the Solitary Walker" (composed 1776–1778)—exemplified the late-18th-century "", and featured an increased focus on subjectivity and introspection that later characterized modern writing.Rousseau befriended fellow philosophy writer Denis Diderot in 1742, and would later write about Diderot's romantic troubles in his "Confessions".During the period of the French Revolution, Rousseau was the most popular of the philosophers among members of the Jacobin Club.