I think the grand unifying theory of everything is computation theory based. Of course I'm guilty of bias, because that's what I understand most.

From Wolfram's physics project, to understanding markets (and especially impossibility of effective central planning due to Wolfram's principle of computational irreducibility), to mind and consciousness, ...

I'm not saying current computational theory explains everything, rather that in order to explain everything explainable (and especially in finding limits of what is and is not explainable), it will all have strong computational theory basis. We know a lot of computation. And computation is about the dynamics of systems. It's a theory of change and what change is possible. And how fast.

If you want to understand the world on a deep level, study informatics and computation. In addition to your field. But study it deeply. You're not aiming for knowing what it is about but in the details, because they matter.