In sum, political consolidation led to economic integration. When combined with maritime technological innovation that allowed trade with more distant land, producers could now exploit economies of scale. European pro-duction of crafts and manufactured goods, centered in towns and cities, expanded. And as markets delivered all manner of goods, the manor too specialised, with some focusing on cash crops like grapes, transformed into wine, instead of the earlier emphasis on necessities like cereals – for cereals could now be bought with the money obtained from selling wine.30 The increase in
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