November 21, 2023 Anderies, J.M. (2015b). Managing variance: key policy challenges for the Anthropocene. Proceedings of the National Academy of Sciences USA 112 (47): 14402-14403. Home » Anderies, J.M. (2015b). Managing variance: key policy challenges for the Anthropocene. Proceedings of the National Academy of Sciences USA 112 (47): 14402-14403.