Criticism can make us improve.
Saying 'good job' for poor performance makes children believe they can succeed without putting in any effort.
Criticism in the form of hate and prejudice, I believe yes, however constructive criticism helps people to improve, so no the world wouldn't be a better place without CONSTRUCTIVE criticism but it would be better without the arrogant bumbf***s that feel the need to criticise others opinions for no logical reason :)
Doctor J Watson 'The Englishman is a patient creature Sir' (his last bow).. criticism is good, all criticism springs from a perception of the feeling central to being, that of deeper understanding than anyone else can possibly have.. lefties and the wicked can't abide it however
Criticism is good when its positive and done in a good way, its never good when its negative.
Would the world be a better place without criticism?! I don't think it would because criticism is just another word and it only make the person being criticize work harder and motivates him to prove the critics wrong!