This poll will stay open till Christmas Eve. Please include justification in the comments section if you dare.
*Update* I am unable to update the poll, however the "Heavy Pastoral" option, not overweight pastoralists, I have a brief explanation. The Early Pastoral in North Africa is characterized by the introduction of domesticated bos taurus primagenius, aka Longhorn. The Middle Pastoral begins around 4000 B.C. and ends around 3100 B.C. or thereabouts. The Middle Pastoral is characterized by dairying [here] and bovid rock art.