Systems theory to social sciences (see David Easton's seminal development of the "political system" as an analytical construct), the original theorists explored the implications of twentieth century advances in terms of systems. People have studied subjects like complexity, self-organization, connectionism and adaptive systems in the 1940s and 1950s. In fields like cybernetics, researchers such as Norbert Wiener, William Ross Ashby, John von Neumann and Heinz von Foerster, examined complex systems mathematically. John von Neumann discovered cellular automata and self-reproducing systems, again with only pencil and paper. Aleksandr Lyapunov and Jules Henri Poincaré worked on the foundations of chaos theory without any computer
Critical understanding context is not meant in a negative sense; rather it outlines a process of thinking. Critical understanding is used to define the process of formulating and understanding a complex problem or difficult set of ideas. In a general sense, it is, ‘a consequence of men’s [sic] beginning to reflect about their own capacity for reflection, about the world, about their position in the world.’ The notion of critical understanding is closely related to the concept of Critical Thinking, described as, ‘reasonable reflective thinking focused on deciding what to believe or do.’ Critical thinking has also been described as, ‘thinking about