darthmocha said:
I am amazed that everyone ignored the most basic and important development in mankind's collective history, Agriculture.
Without farming we would have nothing else and still be hunter gatherers'.
Yes! The agricultural revolution, basically, taught humans the ideas of ownership and artificial selection. These two concepts have been very important throughout human history... although I'm not sure if you can call them achievements.
People have this weird mentality of feeling good about others' efforts. Sports teams, console wars, religion... And now, how to be proud because you were born a human being (as if you could ever be born anything else!)
From the top of my head: Scientific method, cooking, alphabet, meditation, fiction, music, the Internet...
EDIT: I can't see how fire can bee "our" achievement, it's like saying surviving the dinosaur extinction has been "our" achievement: fire was discovered by Homo Erectus... Campfires dating 1.5 million years have been found in Africa.