Henri Fayol was a French mining engineer and director who developed one of the earliest comprehensive theories of general management and administration in the late 19th/early 20th century. He identified six primary functions of management as planning, organizing, commanding, coordinating, controlling, and staffing. He also outlined fourteen principles of management including division of work, authority, discipline, unity of command, unity of direction, subordination of individual interests, remuneration, centralization, scalar chain, order, equity, stability of tenure, initiative, and esprit de corps. His work was published in his 1916 book "Administration Industrielle et Générale" and helped establish the foundations of modern management.