And if you want to understand why they are recurrent, then you'll find the commonality in the shape of the system's components' causality - how they influence e

And if you want to understand why they are recurrent, then you'll find the commonality in the shape of the system's components' causality - how they influence each other, often in loops. These are the subject of control theory, cybernetics (also a systems science), and systems dynamics (if you like maths).