There was TED Talk from person who tried to teach some African people to grow tomatoes. When tomatoes were almost-reap there were a large herd of hippos and eat all tomatoes, completely, fruits and foliage.

At least, this person (sorry, I can not recall name) acknowledge, that it was naive and hubris!

UPDATE: I was not first: https://news.ycombinator.com/item?id=39640882 need to read whole thread before answering!