Again, in a ship, if a man were at liberty to do what he chose, but were devoid of mind and excellence in navigation (αρετης κυβερνη 64;ικης), do you perceive what must happen to him and his fellow sailors? ...

Systems Theory (or Theorie) or General Systems Theory or Systemics is an interdisciplinary field which studies systems as a whole. ...

There are many definitions of complexity, therefore many natural, artificial and abstract objects or networks can be considered to be complex systems, and their study (complexity science) is highly interdisciplinary. Examples of complex systems include ant-hills, ants themselves, human economies, nervous systems, cells and living things,... ...