The word "echolalia" is derived from the Greek ἠχώ, meaning "echo" or "to repeat", and λαλιά (laliá) meaning "babbling, meaningless talk" (of onomatopoeic origin, from the verb λαλέω (laléo), meaning "to talk").
Saw "Catching Fire" tonight. What a movie! I know it is pure fiction, but it made me think of Survivor and others of the same ilk. When you boil down human nature does it always come back to Lord of the Flies? God, I hope not.