1.10 An Inconvenient Truth (but like medieval)

From 950 to 1071, the eastern Mediterranean was wracked by an increased number of droughts and freezes. How did these events shape the world as it was on the eve of the first crusade? As always, maps and sources available at https://historyoftheoutremer.wordpress.com/ (historyoftheoutremer.wordpress.com )and new episodes every other week.