Such a world as described in the OP would probably not even exist.
We are built to be effective creatures, not happy ones. Happiness is no use to you if you're dead, and the traits that define us are chosen, first and foremost, for whether they help us to stay alive, not whether they make us happy.
It's even been proven in laboratory experiments. Such as one project I read about on the web in which two monkeys were placed in adjacent cages, each cage rigged with a lever which, when pressed, dispensed a treat to the monkey in the other cage.
The results were rather disturbing. "Nice" monkeys routinely got stepped on by their peers. When the other monkey learned that he was paired with a "nice" monkey, he pretty quickly stopped pressing his own lever and ceased to reward the "nice" monkey.
The results persisted when the monkeys were removed from the cages. Nice monkeys were mostly ignored rather than recognized for being nice.
However, there is a plus side: "evil" monkeys (who never pressed their lever no matter what) got stepped on as well, and this behavior also persisted outside the lab cages--evil monkeys were actively disliked, and sometimes even physically attacked. The big picture, however, is that "nice" was not the best way. The most effective method for a monkey to gain respect--and therefore treats--from his or her peers was a mixture of nice and evil.
Sorry to bust your chops, but that's just the way the world is.