I have no idea. I know only a few people from a few cities from only one country (mine)... so how can i dare to say that the sum of the feelings of everybody in this overcrowded world is happy or sad?
Each one is unique, so you may find two people living the same live, one being happy with it and other being sad with it. Add to it the difference of life conditions, of cultures, of values, etc, and the final result is unpredictable.
So i think the answer people gives to this question reflects much more their own feelings than the worlds feelings. Cause everything we see is coloured by ourselves with the colors of our own choice...