I have a graduate degree in economics. I never used it professionally, because I think it’s mostly bunk: sophistry masquerading as science. Economics provides few insights that wouldn’t be obvious to a reasonably bright 16-year-old with a grasp of calculus.
To diagnose and solve our current situation, sure, take a look at economics – but then consider the insights of systems science, the structure of networks, futurism, ecology and forms of whole-systems thinking.
Otherwise, we’re going to blow it.