In 1958 Mao Zedong ordered all the sparrows to be killed because they ate too much grain.

Yes, Communism is this stupid. See also, “the “ryazan miracle”.

—“In 1958 Mao Zedong ordered all the sparrows to be killed because they ate too much grain. This caused one of the worst environmental disasters in history. . . .

This lead to a problem the next year. It was noticed that insect infestation of crop fields had soared. Sparrows ate pests such as locusts, and after the campaign, the locusts lost their major predator. This meant that killing the sparrows was counter-productive. The sparrows, it seemed, didn’t only eat grain seeds. They also ate insects.

Locust populations boomed and they ate everything in their path.”—

http://www.thevintagenews.com/2016/09/26/1958-mao-zedong-ordered-sparrows-killed-ate-much-grain-caused-one-worst-environmental-disasters-history/