"There was a drought of unprecedented scale in Syria which devastated the agricultural community, so people streamed into the cities to survive. There was serious social disruption. Therefore, the tragedy that has unfolded in Syria is partly a consequence of global warming."
Before I have time to engage the professor on this particular hot potato, he has driven on. "Syria took in a million or so refugees from Iraq, and on top of that came the huge immigration into the cities. Then events saw some towns emulate the Arab Spring uprisings to which Assad reacted with extreme brutality. The country then entered into the standard dynamics of military conflict.