"A severe drought, worsened by a warming climate, drove Syrian farmers to abandon their crops and flock to cities, helping trigger a civil war".
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Climate Change Helped Spark Syrian War, Study Says
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Starving masses went to their president. "Give us food." He answered "I never liked you anyway, hurry up and die". Syrian war.
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Most other current conflicts/ terrorism are over religion/ jealousy-redistribution of wealth.