The Lifecycle explains one of the natural forces at work driving change, but there are other factors at work as well. Parkinson’s Law is one of the more important of those natural forces impacting business negatively. Cyril Northcote Parkinson (30 July 1909 – 9 March 1993) was a British naval historian and author of some sixty books, the most famous of which was his bestseller Parkinson's Law, which led him to also be considered as an important scholar within the field of public administration. He is credited with the infallible observation that “work expands to fill available time” and by extension “expenses rise to meet income.” It is the idea that work creates work and thus management must be constantly diligent and alert—simplifying and eliminating. That is the ability that governments and bureaucracies seem unable to master. Without change dedicated to simplifying and eliminating, negative forces will drive a business into unsustainable levels of inefficiency.