Gail Tverberg: "In my view, oil and gas resource limits are major contributors to the conflict in Syria. This is happening in several ways: 1. Syria is an oil exporter that is in increasingly perilous financial condition because of depleting oil resources. When oil production is increasing, it can help an oil exporter in two ways: (a) part of the of the oil supply can be used internally, to grow more food and to support increased industry, and (b) exports of oil can be used to provide revenue for governmental programs such as food subsidies, education, and building highways. Syria’s population grew from 8.8 million in 1980 to 22.8 million in 2012, at least in part because of the wealth available from oil extraction."
AT no point in recorded history has our world been so demographically lopsided, with old people concentrated in rich countries and the young in not-so-rich countries. Cf.
https://www.cia.gov/library/publications/the-world-factbook/fields/2177.html