Most recently, look at the green revolution in agriculture. Historically, it is likely that each case where various crops were domesticated had a similar effec

Most recently, look at the green revolution in agriculture. Historically, it is likely that each case where various crops were domesticated had a similar effect. In between, you had the invention of the harness that let draft animals pull a bigger load (and to plow). there was also the invention of the metal plow in the 18th century.