https://www.brookings.edu/articles/disquiet-in-the-worlds-middle-class/
https://medium.com/@SmallArmsSurvey/urban-violence-or-urban-peace-why-are-some-cities-safer-than-others-8626435dd5c7
https://iea.blob.core.windows.net/assets/41800202-d427-44fa-8544-12e3d6e023b4/TheOilandGasIndustryinNetZeroTransitions.pdf