We often assume modern agriculture began after the second world war, when chemical fertilisers massively increased crop yields. Yet a century earlier, droppings harvested from vast colonies of the guanay cormorant, off the coast of South America, provided the phosphate needed to launch a boom in intensive farming. This altered the landscape of North America and Europe for ever, and hastened the decline of farmland wildlife.
Sorta, maybe, might be worth mentioning that it also killed off starvation as a part of the human experience? But no, losing bunnies is more important apparently.