in Systems Thinking, Organizational Cybernetics, Creative Problem Solving and Critical Systems Thinking Gwilym Jenkins (1933–1982) British statistician and systems engineer Clarence Johnson (1910–1990) American aircraft engineer and aeronautical innovator K Rudolf Emil Kálmán (1930–2016) American-Hungarian mathematical system theorist, who is an electrical engineer by training. J. A. Scott Kelso (born 1947) Irish neuroscientist, who in 1985 he founded the Center for Complex Systems and Brain Sciences. Faina Mihajlovna Kirillova (born 1931) Belarusian control theorist and former Department Head of the Institute of Mathematics of the National Academy of Sciences of Belarus. Author of over 350 scientific papers and monographs about optimal control theory. George Klir (1932–2016) Czech-American computer scientist and professor of systems sciences at the Center for Intelligent Systems at the Binghamton University in New York. Author of several texts on systems, including Architecture of Systems Problem Solving. Klaus Krippendorff (born 1932) German cyberneticist, working on the mathematical foundations of cybernetics, general systems, communication and information theories. L Christopher Langton (born 1949) American biologist and one of the founders of the field of artificial life Ervin László (born 1932) Hungarian philosopher of science, systems theorist, integral theorist, and classical pianist Ton de Leeuw (born 1941) Dutch organizational theorist Loet Leydesdorff (born 1948) Dutch sociologist and cyberneticist, known for his work sociology of communication and innovation Edward Norton Lorenz (1917–2008) American mathematician and meteorologist, and an early pioneer of the chaos theory Niklas Luhmann (1927–1998) German sociologist, developed a systems theory applicable in political science from Talcott Parsons works M Robert Engel Machol (1917–1998) American systems engineer and expert in the fields of operations research Humberto R. Maturana (1928–2021) Warren McCulloch (1899–1969) Donella Meadows (1941–2001) American environmental scientist, known as lead author of Limits to Growth Dennis Meadows (born 1942) American economist and systems scientist, known as coauthor of Limits to Growth Mihajlo D. Mesarovic Margaret Mead (1901–1978) Gary Metcalf (born 1957) American organizational theorist and president of the International Federation for Systems Research (2010–) James Grier Miller (1916–2002) Melanie Mitchell American scientist Ian Mitroff (born 1938) American organizational theorist and president of the International Society for the Systems Sciences (1992-93) Edgar Morin (born 1921) French philosopher and sociologist Elon Musk (born 1971) South African engineer, rocket systems designer and co-chairman of OpenAI N John von Neumann (1903–1957) O Eugene Odum (1913–2002) American scientist known for his pioneering work on ecosystem ecology Howard Thomas Odum (1924–2002) American ecosystem ecologist Linda