It’s a simple idea about complex phenomena. And the principle virtue of systems thinking is that it reminds us that the real world is far from simple.
Indeed, when we try to apply simple solutions to complex problems, the solution tends to fail: often spectacularly. And it’s systems thinking that points us in the right direction. We need to think about the whole messy, complex, inter-connected system, if we are to have any chance of finding a solution that makes our problem better.
If only politicians could grasp this simple fact.