The past is such a weird place, not least because there's just so few people actually in it. The 19th and 20th century revolutions in agricultural technology ex

The past is such a weird place, not least because there's just so few people actually in it. The 19th and 20th century revolutions in agricultural technology exploded the numbers of human beings on the planet, particularly coming on the heels of the depopulation of the Americas in the 16th and 17th centuries.