Our species uses music and dance to express various feelings: love, joy, comfort, ceremony, knowledge, and friendship. And each one is distinct and widely recognized within cultures. Love songs cause us to move slowly and fluidly, for example, while songs of joy inspire us to dance in a full-body aerobic way.
I don't think we should have less information in the world. The information age has yielded great advances in medicine, agriculture, transportation and many other fields. But the problem is twofold. One, we are assaulted with more information than any one of us can handle. Two, beyond the overload, too much information often leads to bad decisions.
As soon as you hear a proposition, the creative brain in humans assumes for the moment that it's true, and starts trying to find evidence. It's what computer scientists in the old days used to call 'Fifo:' first in, first out. The first piece of information that gets in has a privileged position, even if it's misinformation.
Because you've been exposed to Western tonal music, you know after a certain chord sequence what the next possibilities are. Your brain has compiled a statistical map of which ones are most likely and least likely. If the song keeps hitting the most likely notes, you'll get bored, and if it's always the least likely ones, you'll get irritated.
The conscious mind can only pay attention to about four things at once. If you've got these nagging voices in your head telling you to remember to pick up the laundry and call so-and-so, they're competing in your brain for neural resources with the stuff you're actually trying to do, like getting your work done.
We need to blinker ourselves, to better monitor our attentional focus. Enforced periods of no email or Internet to allow us to sustain concentration have been shown to be tremendously helpful. And breaks - even a 15-minute break every two or three hours - make us more productive in the long run.
If you're making a bunch of little decisions - like, do I read this email now or later? Do I file it? Do I forward it? Do I have to get more information? Do I put it in the spam folder? - that's a handful of decisions right there, and you haven't done anything meaningful. It puts us into a brain state of decision fatigue.
We get stressed out now by having somebody yell at us in the office or by making a mistake or by losing a bunch of money. These aren't problems that our hunter-gatherer ancestors had. They'd get stressed if a lion came to them or a boulder was rolling towards their living quarters. That kind of stress provoked the fight or flight response.