https://www.esri.ie/system/files/publications/SUSTAT96.pdf
https://www.fsinplatform.org/report/global-report-food-crisis-2019/
https://knowledge.wharton.upenn.edu/article/post-crisis-world-changes-coming/?utm_source=kw_newsletter&utm_medium=email&utm_campaign=2020-05-05
https://insightcrime.org/news/empires-world-wars-history-global-cocaine-trade/