Just as American crops were not the only cause of China’s population boom, they were not the only reason for Europe’s population boom. The potato arrived in the midst of changes in food production so sweeping that some historians have described them as an “agricultural revolution.” Improved transportation networks made it easier to ship food from prosperous areas to places with poor harvests. Marshlands and upland pastures were reclaimed. Shared village land was awarded to individual families, dispossessing many smallholders but encouraging the growth of mechanized agriculture (the new owners
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