An interesting article has surfaced which asserts that unpredictable climate may have had a hand in bringing down the Roman empire in western Europe.
The research was carried out examining samples from various types of trees, or employing the study of dendrochronology. The evidence points out that there were drastic climate changes each decade from 250 to 500 AD. The climate was shifting from dry and cool to warm and wet every 10 years. As such, the agriculture was drastically affected which lead to turmoil as ancient societies were more closely tied to agricultural production – unlike modern societies that can escape such cycles more easily due to improvements in agricultural technology.