Before revision: Having researched several disciplines, including climatology, all civilizations and the Neolithic and Industrial | Revolutions, he reduced White's formula to the following: C = total cereal tonnage produced by one percent of global manpower.
After revision: Having researched several disciplines, including climatology, all civilizations and the Neolithic and Industrial Revolutions, he reduced White's formula to the following: C = total cereal tonnage produced by one percent of global manpower.