The laws of treaties are in constant motion and state of flux, which has different connotations. It relates to motion through time and also the manifestation (or lack thereof) of change. The basic principle of the definition of motion, adopted by the authors, is based on the philosophy of Aristotle. He identified six types of motion: creation (genesis), increase (auxesis), diminution (meiosis), alteration (alloiosis), destruction (phthora), and change of place (kata topon metabole). This last type of motion has been amended by the authors to change in space-time (kata topon kai chronon metavole) to reflect our modern scientific understanding of time as a dimension through which motion and change occurs.