All you need now is a few people who can drive tractors and combine harvesters to produce crops on a big farm. Thousands of people, farming all day, using the traditional methods will not achieve the result that a modern farmer can achieve in an hour. Farming has come a long way, and the technologies are still continuing to improve. And in the future, tractors and harvesters will not even need drivers because they will be self driving.
By the way, have you noticed a combine harvester has a shape that slightly resembles an elephant?
