WHO KILLED COCK ROBIN?

"Who killed Cock Robin?"
 "I," said the Sparrow,
"With my bow and arrow,
I killed Cock Robin."

"Who killed the sparrows?"
 "We," said the Humans,
"With out many deftly hands,
We killed the sparrows.”

“Why kill the sparrows?"
“Because they are so small,
And don’t matter at all,
That’s why we kill the sparrows.”

"Who killed the humans?"
“Mother nature did the act,
For mans breach of contract,
Mother nature had to act”