Philip Gerlee said, This is an interesting question indeed and one that I hope to answer myself in a project I'm doing with a philosopher of science. I think one danger is to call "complex" those systems we currently don't understand, and use the word as a proxy for "interesting".
To me the most interesting aspect is the unifying potential of complex systems theory, which for all we currently know might be superficial.
A previous blog post of mine on the topic:
David Sumpter said, Hi Philip, I read that earlier. How is it going? I would be interested to see what you come up with. What you write about in your article is more to do with 'measuring complexity'. I think. I will come to that in one of the lectures. Although I don't have an answer.