theory to sociology. Mario A. Bunge (1919–2020) Argentine-Canadian physicist and philosopher, author of the 8-volume Treatise on Basic Philosophy (1974–1989), comprising semantics, ontology, epistemology, philosophy of science and ethics. His systemism includes the CESM (composition-environment-structure-mechanism) model for describing and explaining concrete systems. C Donald T. Campbell (1916–1996) American social scientist, who coined the term evolutionary epistemology. Peter Checkland (born 1930) British management scientist, who developed soft systems methodology. Harold Chestnut (1918–2001) American electrical engineer and, who wrote some classic books about systems engineering. C. West Churchman (1913–2004) American philosopher in the field of management science, operations research and systems thinking. James J. Collins American bioengineer and MIT professor. He is one of the founders of the emerging field of synthetic biology, and a pioneering researcher in systems biology, stochastic resonance, biological dynamics and neurostimulation. Gerhard Chroust (born 1941) Austrian systems scientist, and Professor Emeritus for Systems Engineering and Automation at the Institute of System Sciences at the Johannes Kepler University of Linz, Austria. D Vladimir Damgov (1947–2006) Bulgarian physicist, mathematician, union leader and parliamentarian, who particularly contributed to the application of chaos theory. Herman Daly (born 1938) American ecological economist and steady-state theorist. George Dantzig (1914–2005) American mathematician who is considered the "father of linear programming". E David Easton (1917–2014) Canadian political scientist, who developed application of systems theory to political science. Frederick Edmund Emery (1925–1997) Australian psychologist, and pioneers in the field of Organizational development. Hugo O. Engelmann (1917–2002) American sociologist, anthropologist and general systems theorist. Joshua M. Epstein American expert in social and economic dynamics, and member of the Santa Fe Institute. Hugh Everett (1930–1982) American physicist, who developed the use of generalized lagrange multipliers in operations research. F J. Doyne Farmer (born 1952) American physicist, and one of the founding fathers of chaos theory. Mitchell Feigenbaum (1944–2019) American mathematical physicist whose pioneering studies in chaos theory led to the discovery of the Feigenbaum constants. Peter C. Fishburn (1936–2021) American scientist known as a pioneer in the field of decision making processes. Irmgard Flügge-Lotz (1903–1974) German-American mathematician who developed the theory of discontinuous automatic control systems and laid the foundation for automatic on-off aircraft control in jets Heinz von Foerster (1911–2002) Austrian-American scientist combining physics and philosophy. Together with Warren McCulloch, Norbert Wiener, and John von Neumann, Heinz von Foerster was the architect of cybernetics. Jay Forrester (1918–2016) American computer engineer, known as founder of System Dynamics, which